Groesbeck v. Bumbo International Trust ( 2017 )


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  •                                                                            FILED
    United States Court of Appeals
    Tenth Circuit
    November 29, 2017
    UNITED STATES COURT OF APPEALS
    Elisabeth A. Shumaker
    TENTH CIRCUIT                    Clerk of Court
    LINSEY GROESBECK and
    NICHOLAS GROESBECK,
    individually and as next friends and
    guardians of A.G., a minor,
    Plaintiffs - Appellants,
    v.                                                     No. 15-4150
    (D.C. No. 1:13-CV-00090-DB)
    BUMBO INTERNATIONAL TRUST                                (D. Utah)
    f/k/a JONIBACH MANAGEMENT
    TRUST, JONIBACH PTY, LTD. f/k/a
    BUMBO PTY LTD., and WAL-MART-
    STORES, INC.,
    Defendants - Appellees.
    ORDER AND JUDGMENT *
    Before KELLY and HOLMES, Circuit Judges. **
    *
    This order and judgment is not binding precedent, except under the
    doctrines of law of the case, res judicata, and collateral estoppel. It may be cited,
    however, for its persuasive value consistent with Fed. R. App. P. 32.1 and 10th
    Cir. R. 32.1.
    **
    The Honorable Neil Gorsuch heard oral argument in this appeal, but
    has since been confirmed as an Associate Justice of the United States Supreme
    Court; he did not participate in the consideration or preparation of this order and
    judgment. The practice of this court permits the remaining two panel judges, if in
    agreement, to act as a quorum in resolving the appeal. See 
    28 U.S.C. § 46
    (d); see
    also United States v. Wiles, 
    106 F.3d 1516
    , 1516 n.* (10th Cir. 1997) (noting this
    court allows remaining panel judges to act as a quorum to resolve an appeal);
    Murray v. Nat’l Broad. Co., Inc., 
    35 F.3d 45
    , 47–48 (2d Cir. 1994) (remaining two
    judges of original three-judge panel may decide petition for rehearing without
    In this products-liability action, Linsey Groesbeck and Nicholas Groesbeck
    (individually and as next friends and guardians of A.G., a minor) (collectively the
    “Groesbecks”) allege that their child, A.G., suffered severe injuries when she fell
    from the “BUMBO BABY SITTER” seat (“Bumbo Seat”), which Mr. Groesbeck
    had placed on an elevated kitchen counter. As a result of those injuries, the
    Groesbecks brought strict-liability and negligence claims against the manufacturer
    of the Bumbo Seat, Bumbo International Trust f/k/a/ Jonibach Management Trust
    and Bumbo Pty. Ltd. (collectively “Bumbo”), and the retailer of their particular
    seat, Wal-Mart Stores, Inc. (“Wal-Mart”). Finding that the Groesbecks’ claims
    failed as a matter of law, the district court entered summary judgment and a
    subsequent award of costs against them. The Groesbecks appeal.
    Exercising jurisdiction under 
    28 U.S.C. § 1291
    , we affirm the district
    court’s judgment.
    I
    In 1997, Johan Buitendach, a South African toolmaker, and his son, Johan
    Buitendag (collectively the “Buitendachs”) designed, developed, and carved the
    Bumbo Seat—a Styrofoam seat that would allow caregivers to “feed, play, and
    interact” with infants in a “propped up” (but unharnessed) position. Aplts.’ App.,
    third judge), cert. denied, 
    513 U.S. 1082
     (1995).
    2
    Vol. II, at 337 (Decl. of Johan Buitendag, dated Sept. 29, 2014). Following
    limited design adjustments (and other slight modifications), the Buitendachs
    began manufacturing and marketing the product under the umbrella of two family-
    run companies: Bumbo International Trust and Jonibach (Pty) Ltd. In the early
    years, the Buitendachs sold the Bumbo Seat only on a “very small scale” in South
    Africa, but by 2003, expanded their sales to “over 30 countries,” including to the
    United States. 
    Id.
    As the scope of sales expanded, Bumbo submitted the product for consumer
    safety assessments by two independent agencies, Specialised Technology
    Resources (UK) Ltd. (“STR”) and Bureau Veritas Consumer Products Services,
    Inc. (“BVCPS”). In these safety assessments, the Bumbo Seat received
    satisfactory ratings for its physical properties, material and construction qualities,
    and performance characteristics. Similarly, the Bumbo Seat received passing
    scores for the visibility, durability, and size of its warning markings, product
    specifications, and other safety information.
    A
    In June 2004, Bumbo began to receive complaints of infants “fall[ing]” or
    “maneuver[ing]” out of the Bumbo Seat. Aplts.’ App., Vol. III, at 521–22
    (Bumbo’s Log of Customer Complaints). Over the next three years, Bumbo
    documented over 200 similar complaints, with some reporting physical injuries.
    Despite these injuries, Bumbo made no immediate design modifications to the
    3
    Bumbo Seat, reasoning instead that at least some of the blame rested with
    “[p]arents” who failed to “read the [Bumbo Seat’s safety] instructions.” Aplts.’
    App., Vol. IV, at 791 (Dep. of Donald Pillai, dated Mar. 11, 2009).
    Bumbo changed course, however, in October 2007, after receiving a letter
    from the U.S. Consumer Product Safety Commission (“CPSC”). In the letter,
    CPSC described its receipt of “more than 28 reports of young children falling out
    of . . . [Bumbo] seats that had been placed on elevated surfaces.” 
    Id. at 849
     (Dep.
    of Antionette Wagenaar, dated Mar. 10, 2009). Following this communication,
    Bumbo voluntarily recalled (albeit at CPSC’s insistence) the entire retail
    inventory of Bumbo Seats, in order to improve the safety information and
    instructions. As part of these efforts, Bumbo added warnings to the product
    packaging that instructed consumers to “[n]ever use [the Bumbo Seat] on any
    elevated surface,” Aplts.’ App., Vol. II, at 232, warned that “some babies will be
    able to move out of the Bumbo™,” 
    id. at 233
    , and advised parents to “never leave
    [their] child unattended,” 
    id.
     Similarly, Bumbo revised the instructional leaflet
    included within the product packaging to emphasize that the product was intended
    for use “on a safe, ground level surface,” and to reiterate the following warning:
    WARNING
    Prevent falls, never use on any elevated surface.
    Do not use:
    •     as a car or bath seat.
    •     in water.
    •     for prolonged periods.
    Use responsibly, some babies may get out of this seat.
    4
    Never leave your baby unattended.
    
    Id. at 235
    ; accord 
    id. at 318
    . Finally, Bumbo placed these revised warnings on
    the Bumbo Seat itself:
    WARNING
    NEVER USE ON A RAISED SURFACE
    NEVER USE AS A CAR SEAT OR BATH SEAT
    DESIGNED FOR FLOOR LEVEL USE ONLY
    NEVER LEAVE YOUR BABY UNATTENDED
    AS THE SEAT IS NOT DESIGNED TO BE
    TOTALLY RESTRICTIVE AND MAY NOT
    PREVENT RELEASE OF YOUR BABY IN THE
    EVENT OF VIGOROUS MOVEMENT
    ***
    WARNING - Prevent Falls:
    Never use on any elevated surfaces
    
    Id.
     at 236–27; accord Aplts.’ App., Vol. II, at 319. 1
    The CPSC then issued a press release advising consumers that if they
    placed the Bumbo Seat “on a table, countertop, chair, or other elevated surface,
    young children [could] arch their backs, flip out of the Bumbo Seat, and fall onto
    the floor, posing a risk of serious head injuries.” 
    Id.
     Vol. IV, at 962 (Press
    Release, dated Oct. 25, 2007). The CPSC consequently advised that “[c]onsumers
    should use the Bumbo seat at ground level, but should never leave a child
    1
    Visual depictions of these five warnings appear in Appendix A to this
    Order and Judgment, reproduced from the record in the order in which we have
    described them.
    5
    unattended.” 
    Id.
     In addition, the CPSC encouraged consumers to “contact
    Bumbo to obtain new warning label stickers and instructions, free of charge.” 
    Id.
    However, the CPSC did not require the installation of safety restraints, and
    Bumbo declined to make any design changes, opting instead to hire a public
    relations company to educate the public “on the purpose and safe use of the
    product.” 
    Id.
     Vol. III, at 558 (DPK’s Public Relations Recommendation, dated
    Nov. 2007).
    Despite the improved (post-recall) warnings and the public relations
    campaign, Bumbo continued to receive reports of injuries from the use of the
    Bumbo Seat at ground level and on elevated surfaces.
    B
    In the spring of 2010, the Groesbecks purchased their post-recall Bumbo
    Seat from a Wal-Mart in North Logan, Utah, and proceeded to use the product on
    elevated and ground surfaces over the next two years. Despite their lengthy
    period of using the seat, the Groesbecks claimed to be unaware of any safety
    hazards, and believed that the Bumbo Seat could function safely and effectively
    on elevated surfaces.
    Things changed on June 24, 2012. Mr. Groesbeck was preparing breakfast
    for A.G. and her two-year-old brother. With A.G. seated in the Bumbo Seat on
    top of the kitchen island and A.G.’s brother positioned at the opposite end of the
    kitchen counter, Mr. Groesbeck attempted to feed each child. As he reached for
    6
    the dishwasher, however, he heard a sound and turned to find that A.G. had fallen,
    face down, on the tile floor. As a result of the fall, A.G. underwent emergency
    neurosurgery, and the Groesbecks contend that her injuries have caused
    permanent adverse effects.
    C
    During the same general period, the CPSC reported additional “incidents
    and injuries involv[ing] both recalled Bumbo seats and Bumbo seats sold after the
    recall with the additional on-product warnings.” Aplts.’ App., Vol. III, at 554
    (Press Release, dated Nov. 22, 2011). As a result, the CPSC urged parents to “use
    caution,” and reiterated to consumers that infants could “fall or escape from the
    [Bumbo] seat by arching backward, leaning forward or sideways or rocking.” 
    Id.
    In direct communications with Bumbo, the CPSC then detailed its “preliminary
    determination that the Bumbo [S]eats . . . present a Substantial Product Hazard
    (SPH) . . . [and] a Substantial Risk of Injury (SRI) to children,” because “the seat
    [failed to] safely contain infants.” 
    Id.
     Vol. IV, at 1014 (Email, dated Oct. 11,
    2011). Given that assessment, the CPSC demanded that Bumbo prepare “a design
    modification to either address infant retention & tip over; and/or discourage ease
    of placing on high surfaces; and/or address area of impact (e.g. an attached play
    mat—discouraging convenience of counter placement, while also creating a soft
    surface should infant fall out while on floor),” and stated that “the warnings on
    the product and contained in the instructions must be substantially revised.” 
    Id.
    7
    Following these demands, Bumbo voluntarily recalled the Bumbo Seats
    sold throughout the United States. As part of the recall, Bumbo instructed
    consumers to stop using the Bumbo Seat until they ordered and installed the free
    repair kit: “a restraint belt with a warning label, installation instructions, safe use
    instructions and a new warning sticker.” 
    Id.
     Vol. V, at 1017. Bumbo also
    released “Voluntary Recall Safety Information,” explaining that the safety
    restraint would “help prevent children from getting out of or falling from the
    seat,” but nonetheless emphasizing that, “[e]ven with the belt, the seat should be
    used only as intended—on the floor with adult supervision.” 
    Id. at 1031
    .
    D
    Following the 2012 recall, the Groesbecks filed suit against Bumbo and
    Wal-Mart, asserting design-defect and failure-to-warn claims. The district court
    entered summary judgment on each of the Groesbecks’ claims, and subsequently
    awarded Bumbo and Wal-Mart $31,684.32 in costs. The Groesbecks’ timely
    appeal followed.
    II
    “We review a grant of summary judgment de novo, drawing all reasonable
    inferences and resolving all factual disputes in favor of the non-moving party.”2
    2
    Because we review summary-judgment determinations de novo, “we
    need not separately address [the Groesbecks’] argument that the district court
    erred” by misapplying the summary-judgment standard and “by viewing evidence
    in the light most favorable to [Bumbo and Wal-Mart].” Rivera v. City and Cty. of
    8
    Birch v. Polaris Indus., Inc., 
    812 F.3d 1238
    , 1251 (10th Cir. 2015) (quoting
    Yousuf v. Cohlmia, 
    741 F.3d 31
    , 37 (10th Cir. 2014)).
    “A court shall grant summary judgment if ‘the movant shows that there is
    no genuine dispute as to any material fact and the movant is entitled to judgment
    as a matter of law.’” 
    Id.
     (quoting Fed. R. Civ. P. 56(a)). A dispute is genuine
    when “the evidence is such that a reasonable jury could return a verdict for the
    nonmoving party,” and a fact is material when it “might affect the outcome of the
    suit under the governing [substantive] law.” Anderson v. Liberty Lobby, Inc., 
    477 U.S. 242
    , 248 (1986).
    III
    The Groesbecks bring claims under two distinct theories of liability: strict
    liability and negligence. We address each body of claims separately, and
    ultimately conclude that the district court appropriately entered summary
    judgment in favor of Bumbo and Wal-Mart on each of the Groesbecks’ claims.
    A
    We first address the Groesbecks’ position that the district court erred in
    granting summary judgment on their strict-liability claims against Wal-Mart and
    Bumbo for design defect and failure to warn. In entering summary judgment on
    these claims, the district court found that Utah’s passive-retailer doctrine shielded
    Denver, 
    365 F.3d 912
    , 920 (10th Cir. 2004); see also Park v. Gaitan, 680 F. App’x
    724, 730 n.4 (10th Cir. 2017) (unpublished).
    9
    Wal-Mart from strict liability, and that the Groesbecks failed to raise a triable
    issue on their claims against Bumbo. Challenging these conclusions on appeal,
    the Groesbecks argue that the district court misapplied Utah’s passive-retailer
    doctrine, and ignored the genuine and material evidence they raised to support
    their strict-liability claims against Bumbo. We reject these arguments.
    1
    Turning to the Groesbecks’ strict-liability claims against Wal-Mart, the
    district court found that Utah’s passive-retailer doctrine shielded Wal-Mart from a
    strict-liability suit, because Wal-Mart “did not participate in the design,
    manufacture, engineering, testing, or assembly of the Bumbo Seat.” Aplts.’ App.,
    Vol. IX, 2057–59 (Dist. Ct. Order, dated Sept. 9, 2015). The Groesbecks quarrel
    with this conclusion, arguing that “Wal-Mart’s knowledge of the [alleged] defects
    in the Bumbo Seat preclude[] it from relying upon the passive[-]retailer doctrine.”
    Aplts.’ Opening Br. at 46–48; accord Aplts.’ Reply Br. at 24–27. For the reasons
    that follow, we agree with the district court that Utah’s passive-retailer doctrine
    shields Wal-Mart from strict liability, and conclude that Wal-Mart’s knowledge
    (if any) of the alleged defect properly plays no part in that analysis.
    Under Utah’s Product Liability Act (“PLA”), Utah Code Ann. § 78B–6–701
    to –707 (West 2008), a “manufacturer” or “initial seller” of an “unreasonably
    dangerous [product]” can be held liable for the entire amount of any resulting
    damages, id. § 78B–6–703(1); see also Ernest W. Hahn, Inc. v. Armco Steel Co.,
    10
    
    601 P.2d 152
    , 158 (Utah 1979), regardless of the degree of fault “attribut[ed] to
    that individual tortfeasor as opposed to another tortfeasor,” Sanns v. Butterfield
    Ford, 
    94 P.3d 301
    , 305 (Utah Ct. App. 2004) (quoting Nat’l Serv. Indus. v. B.W.
    Norton Mfg. Co., 
    937 P.2d 551
    , 554 (Utah Ct. App. 1997)). In 1986, however, the
    Utah Liability Reform Act (“ULRA”), Utah Code Ann. § 78B–5–820(1) (West
    2008), “replaced the rule of joint-and-several tort liability with a rule of
    comparative fault.” McQuivey v. Fulmer Helmets, Inc., 
    335 P.3d 361
    , 363 (Utah
    Ct. App. 2014). The ULRA’s comparative-fault regime limited the “maximum
    amount” of a defendant’s liability to the “percentage or proportion of fault
    attribut[able] to that defendant.” Utah Code Ann. § 78B–5–820(1).
    Consequently, under the ULRA, “a plaintiff in a products-liability case may
    recover from each defendant only in proportion to that defendant’s fault
    (including strict liability).” McQuivey, 
    335 P.3d at 363
    .
    The ULRA therefore created inherent “[t]ension” with the PLA, in that
    “together they require a finder of fact to apportion relative fault to a codefendant
    whose liability does not depend on fault as commonly understood in tort law.” 
    Id. at 364
    . In response to this tension, Utah state courts “devised the passive-retailer
    doctrine”—“an exception to strict liability” under the PLA for sellers “who do not
    ‘participate in the design, manufacture, engineering, testing, or assembly’ of a
    product.” 
    Id.
     (quoting Sanns, 
    94 P.3d at 307
    ).
    “Under this doctrine, ‘a passive retailer is not subject to a strict liability
    11
    claim . . . where the manufacturer is a named party to the action.’” 
    Id.
     (omission
    in original) (quoting Yirak v. Dan’s Super Mkts. Inc., 
    188 P.3d 487
    , 489 (Utah Ct.
    App. 2008)). In that scenario, Utah courts reason, “there remains no
    [justification] to require [a passive retailer] to incur the time and expense of
    defending” the action, Sanns, 
    94 P.3d at 307
    , because strict liability fault “lies
    with the manufacturer, not with . . . the passive retailer,” Yirak, 
    188 P.3d at 489
    (Utah Ct. App. 2008) (quoting Sanns, 
    94 P.3d at 307
    ).
    Utah courts have discussed and applied the passive-retailer doctrine on a
    few occasions. In each decision, the Utah courts have stressed the doctrine’s
    sweeping breadth and straightforward application. In Sanns, for example, a
    commercial van unexpectedly “rolled several times, seriously injuring [the
    plaintiff] and other passengers.” 
    94 P.3d at 303
    . As a result, the plaintiff brought
    suit “to hold both [the retailer] and [the manufacturer] strictly liable for
    manufacturing and design defects in the van.” 
    Id. at 307
    . Nevertheless, because
    the retailer had no part “in the design, manufacture, engineering, testing, or
    assembly of the van,” the Utah Court of Appeals determined that the passive-
    retailer doctrine shielded the retailer from strict liability. 
    Id. at 307
    .
    Similarly, in Yirak, the plaintiff discovered a piece of glass in her
    prepackaged salad, and proceeded to bring strict-liability claims against the seller
    and the manufacturer. See 
    188 P.3d at 488
    , 489 n.3. As in Sanns, however, the
    undisputed evidence demonstrated that the retailer played no role in the
    12
    “manufacture [], design [], repackag[ing], label[ing], or inspect[ion] [of] the
    prepackaged salads supplied by [the manufacturer],” 
    id. at 489
     (first and second
    alterations in original) (quoting the record), and the Utah Court of Appeals
    concluded that the passive-retailer doctrine shielded the retailer from strict
    liability, 
    id. at 490
    .
    Finally, in McQuivey, after a protective helmet collapsed during an all-
    terrain vehicle crash, the plaintiff brought suit against the foreign manufacturer
    and the domestic distributor. See 
    335 P.3d at 362
    . The domestic distributor
    argued for application of the passive-retailer doctrine, but the record evidence
    reflected that the distributor exercised some involvement in the helmet design (by
    receiving samples), participated in the manufacture and testing (by conducting on-
    site visits of the assembly line and reviewing quality-control procedures), and
    held “itself out to the public as the manufacturer.” 
    Id. at 365
    . Accordingly, the
    Utah Court of Appeals found the passive-retailer doctrine inapplicable. 
    Id. at 366
    .
    Sanns, Yirak, and McQuivey, individually and collectively, speak to one
    clear premise: a passive retailer cannot be held strictly liable for a product defect
    unless the record evidence discloses some basis to conclude that the retailer
    participated in the design, manufacture, engineering, testing, or assembly of the
    challenged product. Viewed through this lens, the passive-retailer doctrine
    squarely defeats the Groesbecks’ strict-liability claim against Wal-Mart, because
    13
    the Groesbecks concede that Wal-Mart performed none of these functions. The
    Groesbecks acknowledge instead Bumbo’s exclusive role in the design,
    manufacture, engineering, testing, and assembly of the Bumbo Seat.
    Nonetheless, the Groesbecks “quote” Sanns and Yirak for the proposition
    that “knowledge of any design or manufacturing defect” defeats passive-retailer
    protection, Aplts.’ Opening Br. at 46 (purporting to quote Sanns, 
    94 P.3d at
    305–06), and then proceed to recount the evidence that reveals, in their view,
    Wal-Mart’s “knowledge of the Bumbo Seat’s defects,” id. at 46. The passive-
    retailer doctrine, however, includes no knowledge component, and the
    Groesbecks’ Sanns-centric argument relies on a summary of the Utah trial court’s
    decision, not the Sanns holding. Compare id. (“Under Utah law, a passive retailer
    is a seller who ‘did not participate in the design, manufacture, engineering, testing
    or assembly’ of the product and who had “no knowledge of any design or
    manufacturing defect.” (purporting to quote Sanns, 
    94 P.3d at
    305–06)), with
    Sanns, 
    94 P.3d at 307
     (reciting the trial court’s finding that the retailer “was
    merely a passive retailer with no knowledge of any design or manufacturing
    defects,” but concluding on appeal that the retailer qualified as a passive retailer
    because it “did not participate in the design, manufacture, engineering, testing, or
    assembly” of the challenged product (emphasis added)). Similarly, the Yirak
    court mentioned knowledge in a parenthetical summary of Delaware’s statutory
    approach to the passive-retailer doctrine, see 
    188 P.3d at
    489 n.4 (quoting Del.
    14
    Cod. Ann. tit. 18, § 7001 (West 1999)), and then in summarizing the plaintiff’s
    wide-ranging evidentiary deficiencies on summary judgment, see id. at 489, but
    not in defining the contours of Utah’s passive-retailer exception.
    Thus, the Groesbecks’ position that knowledge constitutes a required
    element of the passive-retailer doctrine finds no convincing source in Utah law,
    and “it is not our place to expand Utah state law beyond the bounds set by the
    Utah [state courts].” Belnap v. Iasis Healthcare, 
    844 F.3d 1272
    , 1295 (10th Cir.
    2017) (quoting Proctor & Gamble Co. v. Haugen, 
    222 F.3d 1262
    , 1280 (10th Cir.
    2000)). For all of these reasons, we conclude that the entry of summary judgment
    was appropriate on the Groesbecks’ strict-liability claim against Wal-Mart.
    2
    We next address the Groesbecks’ argument that the district court erred in
    granting summary judgment on their strict-liability claims against Bumbo for
    design defect and failure to warn. Addressing each aspect of these claims, we
    agree with the district court’s summary-judgment decision.
    a
    Under Utah law, “[p]roducts liability [claims] always require[] proof of a
    defective product, which can include ‘manufacturing flaws, design defects, and
    inadequate warnings regarding use.’” Gudmundson v. Del Ozone, 
    232 P.3d 1059
    ,
    1070 (Utah 2010) (quoting Bishop v. GenTec Inc., 
    48 P.3d 218
    , 225 (Utah 2002)).
    In order to recover for a design defect under a strict-liability theory, the
    15
    Groesbecks must prove: “(1) that a defect or defective condition of the product
    made it unreasonably dangerous, (2) that the defect was present at the time of the
    product’s sale, and (3) that the defective condition [caused] the plaintiff’s
    injuries.” 
    Id. at 1072
     (emphasis added) (quoting Schaerrer, 79 P.3d at 928); see
    also Utah Code Ann. § 78B–6–703(1) (describing the same standard).
    The PLA then defines the critical term “unreasonably dangerous” to mean:
    that the product was dangerous to an extent beyond which would
    be contemplated by the ordinary and prudent buyer, consumer, or
    user of that product in that community considering the product’s
    characteristics, propensities, risks, dangers, and uses together
    with any actual knowledge, training, or experience possessed by
    that particular buyer, user, or consumer.
    Utah Code Ann. § 78B–6–702. Simply stated, the statutory definition “imposes
    ‘an objective consumer expectations test’ supplemented by a ‘subjective test
    based on the individual knowledge, training, and experience of the particular
    buyer, user, consumer, or, possibly, victim.’” Henrie v. Northrop Grumman
    Corp., 
    502 F.3d 1228
    , 1232 (10th Cir. 2007) (interpreting and applying Utah law)
    (quoting Brown v. Sears, Roebuck & Co., 
    328 F.3d 1274
    , 1282 (10th Cir. 2003)). 3
    Under the objective test, “[t]he issue, roughly speaking, [concerns] whether
    an ordinary person would think the product is less dangerous than it is.” Brown,
    
    328 F.3d at 1280
    . The subjective component, by contrast, considers “the
    3
    Henrie and Brown discuss Utah Stat. Ann. § 78–15–6, a statute that
    has since been renumbered as Utah Code Ann. § 78B–6–703 (the version of the
    PLA we discuss and apply here).
    16
    particular person’s appreciation of the product’s danger,” id. at 1282, as evident
    from the “actual knowledge, training, or experience possessed by that particular
    buyer, user or consumer,” Utah Code Ann. § 78B–6–702; see also Brown, 
    328 F.3d at
    1281–82. Importantly, subjective “information can only work against a
    plaintiff’s claim that a product is unreasonably dangerous because it increases the
    extent of the perceived danger beyond that contemplated by the ordinary and
    prudent person.” Brown, 
    328 F.3d at 1282
    ; see also Henrie, 
    502 F.3d at 1232
    .
    Consequently, if a product does not meet the objective meaning of “unreasonably
    dangerous,” courts need not reach “the subjective information of the ‘particular’
    person.” Niemela v. Imperial Mfg., Inc., 
    263 P.3d 1191
    , 1196 (Utah Ct. App.
    2011) (quoting Brown, 
    328 F.3d at 1282
    ).
    Considering these matters, the district court reasoned that the Bumbo Seat
    failed to qualify as “unreasonably dangerous” because the combination of
    “[c]ommon sense” and the numerous product warnings readily disclosed the risk
    of children falling from the seat. Aplts.’ App., Vol. IX, at 2061–62. To bolster
    this conclusion, the district court pointed to the “remarkably” low number of falls
    (ninety-one out of 3.85 million Bumbo Seats sold), and concluded that “the
    ordinary and prudent consumer understood the danger a Bumbo Seat pose[d] and
    [did] not risk leaving a child unattended on an elevated surface.” 
    Id.
    In ascribing error to this disposition, the Groesbecks draw our attention to
    17
    three pieces of “material” evidence: 4 first, the conclusion of their liability expert,
    Dr. John E. Meyer, on the “unreasonably dangerous and defective[] design[],”
    given the product’s “clear propensity to cause serious injuries to children—even
    while being used on the floor”; second, to the ongoing, post-recall injuries and the
    related reports on the beneficial impact of a safety restraint system; and third, to
    the fact that other district courts have denied summary judgment on design-defect
    claims raising the “precise question” at issue here.5 Aplts.’ Opening Br. at 20–23.
    None of this evidence raises a genuine dispute regarding the Groesbecks’ design-
    defect claim.
    4
    In addition, the Groesbecks refer us, without discussion, to “other
    evidence” contained within widely scattered portions of the appellate record.
    Aplts.’ Opening Br. at 22 (citing Aplts.’ App., Vol. III, at 438–43, 453–58,
    715–17; 
    id.
     Vol. IV, at 742–43, 834–35, 854–55, 860–61, 865, 939–41; 
    id.
     Vol. V,
    at 1091)). The “other evidence” includes (1) pieces of the Groesbecks’ summary
    judgment submissions to the district court, see Aplts.’ App., Vol. III, at 438–43,
    453–58; (2) largely obscured Bumbo marketing materials, see 
    id.
     at 715–17; (3)
    pages of deposition testimony, see 
    id.
     Vol. IV, at 742–43, 834–35, 854–55,
    860–61, 865, 939–41; and (4) a document entitled “Standard Consumer Safety
    Specification for Children’s Chairs and Stools.” Aside from identifying this
    “evidence,” the Groesbecks provide no substantive discussion of these materials;
    yet, “bald assertions in briefs,” as here, do not provide a sufficient basis to invoke
    appellate review, much less to demonstrate genuine disputes of material fact
    sufficient “to merit reversal of summary judgment.” Adler v. Wal-Mart Stores,
    Inc., 
    144 F.3d 664
    , 679 (10th Cir. 1998).
    5
    The Groesbecks complain that the district court erred by considering
    the affirmative defense of product misuse in the context of summary judgment.
    However, neither Bumbo nor Wal-Mart appeared to move for summary judgment
    on a defense of misuse. And, more to the point, the district court’s decision does
    not reference or dispose of any such defense. As a result, we need not address this
    matter further.
    18
    Under the objective inquiry applicable here, we consider whether the
    Bumbo Seat posed a greater risk of falling (whether from an elevated surface or
    not) than “would be contemplated by the ordinary consumer . . . with the ordinary
    knowledge common to the community as to [the Bumbo Seat’s] characteristics.”
    Brown, 
    328 F.3d at
    1280–81 (quoting R ESTATEMENT (S ECOND ) OF T ORTS § 402A,
    cmt. i (Am. Law. Inst. 1965)). In other words, Utah law considers a product
    objectively defective “only where the product is, at the time it leaves the seller’s
    hands, in a condition not contemplated by the ultimate consumer, which will be
    unreasonably dangerous to him.” Henrie, 
    502 F.3d at 1233
     (quoting
    R ESTATEMENT (S ECOND ) OF T ORTS § 402A, cmt. g).
    Utah’s consumer-expectations test therefore differs markedly from the risk-
    utility analysis that some jurisdictions employ, where the inquiry focuses on “the
    actual risks and benefits of the design” and relies upon expert evidence regarding
    product safety and feasible, alternative designs. Brown, 
    328 F.3d at 1281
    . This
    critical legal distinction proves dispositive here. A straightforward (untrained)
    inspection of the Bumbo Seat (at the relevant time of sale) reveals the following:
    (1) the product consists of a single piece of molded foam with leg holes and
    without any semblance of a restraint system; (2) the product bears numerous
    warnings advising consumers never to use the product on elevated surfaces; and
    (3) the warnings on the product and packaging specifically disclose (in numerous
    locations) the risk of a fall or “release . . . in the event of vigorous movement.”
    19
    Aplts.’ App., Vol. II, at 236–37 (depicting images of the Bumbo Seat); see also
    
    id.
     Vol. III, at 582 (explaining, based on a visual inspection and certain
    specification documents, that the Bumbo Seat “possesses no restraints, but rather
    depends on the geometric design of the device to restrain the occupant”); 
    id.
     Vol.
    IV, at 962 (describing the Bumbo Seat as a piece of molded foam with leg holes,
    with warnings advising that “the seat is not designed to be totally restrictive and
    may not prevent release . . . in the event of vigorous movement’”). Viewed in this
    light, the Bumbo Seat’s physical appearance and its warnings should have
    suggested a risk of falling to the ordinary and prudent consumer, especially when
    the seat is used on raised surfaces. 6
    6
    Relying on similar observations, the district court reasoned that
    “[c]ommon sense” would have warned “the ordinary and prudent consumer” of the
    risk of release “without a restraint.” Aplts.’ App., Vol. IX, at 2061. The
    Groesbecks challenge this assertion by arguing that the district court improperly
    “hazard[ed] a guess at what ‘common sense’ may tell ‘the ordinary and prudent
    consumer,’” all while ignoring any common sense inference in their favor. Aplts.’
    Opening Br. at 24–25. Relying on their expert and Bumbo’s marketing materials,
    the Groesbecks then suggest that “the Bumbo Seat’s allegedly ‘revolutionary’
    design—and Bumbo’s marketing campaign—caused parents to either
    underestimate the dangers posed by the Bumbo Seat, or to fail to comprehend any
    danger at all.” Id. at 25 (quoting Aplts.’ App., Vol. V, at 505–06).
    We find no fault in the district court’s analysis, however. Though
    they do not use the term “common sense” (or a derivative thereof), the court’s
    approach is consistent with the analysis evident in Brown, Henrie, and Niemela.
    In Brown, the plaintiff’s two-year-old son suffered injuries after a lawnmower
    backed over him, and the plaintiff brought suit on the theory that the lawnmower
    could have been equipped with a safety feature that prevented it from traveling in
    reverse with the mower blades engaged. See 
    328 F.3d at
    1276–77. Based on our
    (continued...)
    20
    With those observations in mind, the question becomes whether the
    Groesbecks’ recounted evidence on appeal raises a triable issue on whether the
    ordinary consumer would have expected that an unrestrained infant might fall
    from the Bumbo Seat if it was left on an elevated surface. Addressing each piece
    of evidence, we conclude that their evidence falls short.
    The Groesbecks’ expert, Dr. Meyer, defined the Bumbo Seat as an
    “unreasonably dangerous” product. 7 
    Id.
     Vol. III, 494 (Decl. of Dr. John E. Meyer,
    dated June 23, 2014). Dr. Meyer’s conclusion, however, hinged on his view of
    the beneficial impact of an alternative safety system, not on his opinion of the
    6
    (...continued)
    perspective of the product (and the lack of any sufficiently compelling counter-
    arguments or evidence), however, we determined that “[a]n ordinary and prudent
    user of the mower would have appreciated the danger arising from the operation of
    the mower blades while the tractor was moving in reverse.” 
    Id. at 1283
    .
    Similarly, in Henrie, the plaintiff injured his arm and shoulder while using a “glass
    fixture” to paint military airplane parts. 
    502 F.3d at 1229
    . Based on our review of
    the evidence, however, we concluded that the glass fixture did not meet Utah’s
    standard for “unreasonably dangerous,” because the “community of users . . .
    contemplated” the relevant hazard. 
    Id. at 1238
    . Finally, in Niemela, the plaintiff
    alleged that a mailbox’s design defect caused her serious and permanent hand
    injuries. See 
    263 P.3d at 1194
    . In considering the objective inquiry, however, the
    Utah Court of Appeals concluded, “[i]n [its] judgment,” that the mailbox flaws
    provided insufficient evidence to meet the consumer-expectations test. 
    Id. at 1197
    (emphasis added). These decisions endorse a common-sense approach, and we
    follow them here.
    7
    In addition, Dr. Meyer opined that Bumbo’s design violated industry
    standards. Dr. Meyer, however, offers his industry-standards opinion only as
    added support for his position on a safer alternative design; consequently, this
    aspect of his opinion likewise fails to address the objective expectations of the
    ordinary consumer regarding the product as actually marketed and purchased here.
    21
    ordinary consumer’s expectations of the product as marketed and purchased here.
    Indeed, in his nineteen-page report, Dr. Meyer details, at great length, a safer and
    economical alternative design, but makes no reference to the consumer-
    expectations analysis. Nor does he offer an opinion on the central question here:
    whether the Bumbo Seat posed a danger beyond what “would be contemplated by
    the ordinary and prudent buyer, consumer or user of [the Bumbo Seat] in th[e]
    community.” Henrie, 
    502 F.3d at 1233
     (quoting 
    Utah Code Ann. § 78
    –15–16(2)
    (the PLA prior to renumbering)). Dr. Meyer’s opinion therefore creates no
    genuine dispute of material fact on the Groesbecks’ design-defect claim. See
    Henrie, 
    502 F.3d at 1230, 1233
     (finding expert evidence of a safer alternative
    design insufficient to satisfy the consumer-expectations test under Utah law);
    Brown, 
    328 F.3d at 1279
    , 1282–83 (finding that an expert report on a safer
    alternative design failed to satisfy the objective test under Utah law).
    The Groesbecks fare no better with their evidence of ongoing injuries and
    reports on the benefit of a safety restraint. Specifically, the Groesbecks draw our
    attention, in particular, to the following: (1) a November 19, 2001 safety
    assessment by TŪV Product Service (“TŪV”); (2) the continual injuries post-2007
    recall (and warnings revisions); and (3) various correspondence and reports
    relative to the 2012 product recall. However, at bottom, this evidence lends them
    no succor.
    In the safety assessment, TŪV concluded that the Bumbo Seat showed
    22
    “[c]ritical anomal[ies] for . . . safety,” Aplts.’ App., Vol. III, at 510 (Technical
    Report No. 70021218, dated Nov. 19, 2001), because the product rested at a low
    angle and lacked a safety restraint system, among other issues immaterial to this
    appeal, see 
    id.
     at 511–12. Although dressed in different terms, the TŪV
    assessment ultimately offers nothing more than Dr. Meyer’s. TŪV simply
    identifies a safer alternative design, but provides no information from which one
    might divine the objective expectations of the ordinary (non-expert) consumer.
    See Niemela, 
    263 P.3d at 1197
     (rejecting the notion that the existence of an
    “easier to use” or “safer” alternative addresses whether the product was
    unreasonably dangerous).
    Similarly, the Groesbecks point to the ongoing incidents after the 2007
    recall. But they offer no connection between the mere occurrence of additional
    injuries and the objective expectations of the ordinary consumer. Beyond that,
    we agree with the district court that the number of incidents concerning the
    Bumbo Seat, .0049%, 8 does not militate in favor of finding a genuine dispute of
    8
    The Groesbecks urge us to credit the “higher number” of incidents
    known to Bumbo (318), rather than the CPSC’s reported figure (ninety-one). The
    “higher number,” however, captures a wide swath of issues, and not just the
    circumstance that forms the foundation for the Groesbecks’ claim—i.e., falls from
    elevated surfaces. See Aplts.’ App., Vol. III, at 554 (identifying forty-five falls
    from elevated surfaces that occurred after the October 25, 2007 recall); 
    id.
     Vol.
    IV, at 962 (identifying twenty-eight reports of falls from elevated surfaces prior to
    the October 25, 2007 recall); 
    id.
     at 971–1011 (listing all known incidents relative
    to the Bumbo Seat). Consequently, we see no reason to adopt the higher figure,
    (continued...)
    23
    material fact on the expectations of the ordinary consumer. See 
    id. at 1197
    (finding the mere occurrence of injuries insufficient, without more, “to establish
    that a product is unreasonably dangerous”).
    Finally, we reject the Groesbecks’ effort to create a genuine dispute of
    material fact through reliance on correspondence and reports relative to the 2012
    product recall. The consumer-expectations test at issue here “considers a
    defective condition to be present ‘only where the product is, at the time it leaves
    the seller’s hands, in a condition not contemplated by the ultimate consumer,
    which will be unreasonably dangerous to him.’” Henrie, 
    502 F.3d at 1233
    (emphasis added) (quoting R ESTATEMENT (S ECOND ) T ORTS § 402A, cmt. g). The
    circumstances surrounding a recall that occurred over two years later hardly
    serves to significantly inform this at-the-time-of-sale inquiry, and the Groesbecks
    have provided no authority to support their reliance on such temporally distant
    information. 9
    For all of these reasons, we conclude that the district court’s entry of
    8
    (...continued)
    and even if we did, our conclusion would remain the same.
    9
    Nor are we persuaded by the fact that “four [district] courts” from
    outside this circuit denied summary judgment with respect to purportedly
    analogous circumstances; those decisions applied different state laws to distinct
    factual records. Aplts.’ Opening Br. at 22 (referring to district court decisions
    from the Southern District of Texas, the Western District of Missouri, the Southern
    District of Florida, and the District of Arizona). Setting aside this critical
    distinction, federal district court decisions—whether within or without our
    circuit—are not binding on us.
    24
    summary judgment on the Groesbecks’ strict-liability claim against Bumbo for
    design defect was appropriate, and turn to the Groesbecks’ claim against Bumbo
    for failure to warn.
    b
    Under Utah law, “a manufacturer may be held strictly liable for any
    physical harm caused by its failure to provide adequate warnings regarding the
    use of its product.” House v. Armour of Am., Inc., 
    929 P.2d 340
    , 343 (Utah
    1996). As with a claim for design defect, in order to recover on an inadequate-
    warnings claim under a strict-liability theory, the Groesbecks must prove: (1) that
    a defect or defective condition of the product made it unreasonably dangerous, (2)
    that the defect presented itself at the time of the product’s sale, and (3) that the
    defective condition caused the plaintiff’s injuries. See Gudmundson, 232 P.3d at
    1072; see also Schaerrer v. Stewart’s Plaza Pharmacy, Inc., 
    79 P.3d 922
    , 928
    (Utah 2003) (same).
    Under this standard, an adequate warning “must completely disclose all [of]
    the risks involved, as well as the extent of those risks.” House v. Armour of Am.,
    Inc., 
    886 P.2d 542
    , 551 (Utah Ct. App. 1994), aff’d, House, 
    929 P.2d 340
    . The
    “warning must (1) be designed so it can reasonably be expected to catch the
    attention of the consumer; (2) be comprehensible and give a fair indication of the
    specific risks involved with the product; and (3) be of an intensity justified by the
    magnitude of the risk.” 
    Id.
     (quoting Pavlides v. Galveston Yacht Basin, Inc., 727
    
    25 F.2d 330
    , 338 (5th Cir. 1984)). As in the design-defect context, a warning’s
    overall adequacy “must be judged in light of the ordinary knowledge common to
    members of the [relevant] community” at the time of sale. Id.; see also Utah
    Code Ann. § 78B–6–703(1) (explaining that the claimed defect—inadequate
    warnings—must exist at the time of sale); Dimick v. OHC Liquidation Trust, 
    157 P.3d 347
    , 350 (Utah Ct. App. 2007) (same).
    Applying these principles, the district court found Bumbo’s warnings
    adequate as a matter of law, given the “intuitively clear” risk of using the product
    on a raised surface. Aplts.’ App., Vol. IX, at 2064–65. In doing so, the district
    court noted the “two warnings on the box; one on the leaflet; and two on the
    product itself,” and stressed that “the warning on the front of the Bumbo Seat
    unambiguously state[d] ‘Prevent Falls: Never use on any elevated surface.’” 
    Id. at 2064
    .
    Challenging this decision on appeal, the Groesbecks focus their attention on
    the evidence that: (1) consumers often disposed of the Bumbo box after the time
    of sale, and that the box’s “overabundance of information” may have, in any
    event, diminished the ostensible importance of the product warning; (2)
    typographical issues often obscured the on-product warnings after the time of
    sale; (3) the on-product warnings failed to adequately convey the ease with which
    a child could maneuver out of the seat, and the propensity of such maneuvering to
    cause severe injury; and (4) the warnings should have been, in the opinion of the
    26
    Groesbecks’ expert, more conspicuous given the product’s seemingly benign and
    innocuous appearance. Aplts.’ Opening Br. at 36–42. Despite their insistence to
    the contrary, none of this evidence raises a genuine dispute of material fact on the
    Groesbecks’ warnings-based claim.
    The Bumbo Seat at the time of sale advised consumers in five separate
    locations (and in emphasized print distinct from the surrounding material) against
    engaging in the precise conduct that engendered A.G.’s injuries—that is, using
    the Bumbo Seat on an elevated surface. The two warnings on the box stressed
    that the Bumbo Seat should never be used on elevated surfaces, and explained that
    “some babies will be able to move out of the Bumbo,” Aplts.’ App., Vol. II, at
    232–34; the instructional leaflet reiterated this instruction and added that
    consumers should “[u]se [the product] responsibly, [because] some babies may
    get out of this seat,” 
    id. at 235
    ; and the on-product warnings reinforced these
    directions by stating that the Bumbo Seat “MAY NOT PREVENT RELEASE OF
    YOUR BABY IN THE EVENT OF VIGOROUS MOVEMENT” and that, to avoid
    falls, consumers should “[n]ever use on any elevated surfaces,” 
    id.
     at 236–37.
    To the ordinary consumer, the numerosity, clarity, and prominence of these
    warning would easily have communicated the dangers of placing the Bumbo Seat
    on an elevated surface. Indeed, Bumbo used typographical features (size, color,
    and capitalization) to underscore the importance of the warnings and to squarely
    address the relevant risk of falls—among other means, warning of the hazard in
    27
    capitalized, bolded, and red-print font on the product itself. See infra App. A.
    Furthermore, it positioned the numerous warnings in a manner justified by the
    magnitude of the risk. Although the Groesbecks would undoubtedly quarrel with
    these conclusions, their unsubstantiated challenges to the adequacy of the
    warnings fail to raise a genuine dispute of material fact.
    We also are not persuaded by the Groesbecks’ contentions regarding
    disposal of warnings and alleged typographical deficiencies. See Aplts.’ App.,
    Vol. III, 632 (Decl. of Michael Wogalter, Ph.D., dated Dec. 3, 2014) (explaining
    the “well known [concept] that people commonly discard packaging after removal
    of the product – as Mrs. Groesbecks did here”), 
    id.
     Vol. IV, 787 (deposition
    testimony of Bumbo’s marketing executive, Mr. Pillai, in which he acknowledges
    that consumers discard the Bumbo box and leaflet, leaving only the product
    itself). In this regard, we underscore that the adequacy inquiry focuses on the
    nature of the warnings at the time of sale. Specifically, Utah law requires that the
    defect be present at the time of sale, see Utah Stat. Ann. § 78B–6–703(1) (“[A]
    product may not be considered to have a defect or to be in a defective condition,
    unless at the time the product was sold by the manufacturer or other initial seller,
    there was a defect or defective condition in the product which made the product
    unreasonably dangerous to the user or consumer.” (emphasis added)). By
    contrast, without reference to controlling or persuasive authority, the Groesbecks
    would have us assess adequacy through the prism of after-sale consumer conduct
    28
    (the immediate disposal of the packaging materials, etc.) and typographical issues
    that emerge after sale (fading ink and the like). This we cannot do.
    More specifically, we cannot discern a sound legal basis for discounting the
    significance of written warnings simply because consumers ultimately ignore
    them. Similarly, we cannot conclude that typographical issues (most of which
    arose after the time of sale) create a genuine dispute of material fact regarding the
    adequacy of the Bumbo’s overall warnings.
    Considering the warnings in the form provided at the time of sale, we
    conclude that the district court’s entry of summary judgment was appropriate on
    the Groesbecks’ strict-liability claim against Bumbo for failure to warn.
    B
    We next address the Groesbecks’ position that the district court erred in
    granting summary judgment on their negligence claims against Bumbo (premised
    on the same theories underpinning their strict-liability claims) and against Wal-
    Mart (for breach of the alleged post-sale duty to warn).10 In entering summary
    judgment in Wal-Mart’s favor, the district court applied a purported post-sale
    duty to warn under Utah law, but found no violation of that duty as a matter of
    10
    The Groesbecks’ briefing leaves some ambiguity on the precise
    contours of their negligence claims against Wal-Mart. Nevertheless, their claim
    for breach of the continuing duty to warn appears to present their only potentially
    viable negligence claim, and the only theory they substantively and specifically
    press on appeal.
    29
    law. Turning to the Groesbecks’ negligence claim against Bumbo, the district
    court reasoned that their general negligence claim failed for the same reasons as
    their substantively identical strict-liability claim. Challenging these conclusions,
    the Groesbecks argue that the district court misapplied Wal-Mart’s post-sale duty
    to warn, and disregarded the material evidence that supported their negligence
    claims against Bumbo. We reject these arguments.
    1
    Turning first to Wal-Mart’s alleged post-sale duty to warn, the district court
    concluded that the Groesbecks failed to raise a genuine factual dispute on the
    breach of this alleged duty, because the Groesbecks failed to demonstrate that
    Wal-Mart could identify the purchasers of the Bumbo Seat or devise a means of
    effectively communicating the post-sale danger. For the reasons explicated
    below, we uphold the district court’s ruling.
    We note at the outset that we are not aware of any Utah appellate case that
    has applied a post-sale duty to warn in the context of a product seller, and perhaps
    more importantly, the Groesbecks have not identified one. The district court
    relied in its analysis on a case from the District of Utah, Herrod v. Metal Powder
    Products, 
    886 F. Supp. 2d 1271
     (D. Utah 2012), which did indicate that such a
    duty attaches under certain circumstances to manufacturers or sellers of products.
    See 
    id. at 1277
    . However, in doing so, Herrod did not rely on Utah appellate
    authority directly supporting that proposition. Instead, it looked to another
    30
    federal case out of the District of Utah, Dowdy v. Coleman Co., No.
    1:11CV45DAK, 
    2011 WL 6151432
     (D. Utah 2011) (unpublished).
    Dowdy concluded that “the original seller” of the product at issue was
    subject to such a post-sale duty to warn, but it did so only by equating such sellers
    to a class of business entities that are clearly subject to such a duty under Utah
    law—that is, successor entities that acquire the assets of a predecessor business
    that produced or distributed an allegedly defective product. 
    Id. at *3
     (“[T]he
    reasons for imposing a post-sale duty to warn in the successor context are the
    same as the reasons for imposing a continuing duty to warn on the original
    seller.”); see Tabor v. Metal Ware Corp., 
    168 P.3d 814
    , 818 (Utah 2007)
    (imposing “an independent post-sale duty on successor corporations to warn
    customers of defects in products manufactured and sold by the predecessor
    corporation”) (emphasis added); see also R ESTATEMENT (T HIRD ) OF T ORTS :
    P RODUCTS L IABILITY § 13 (Am. Law Inst. 1998) [hereinafter RESTATEMENT O F
    T ORTS (T HIRD )] (providing in certain circumstances that a “successor corporation
    or other business entity that acquires assets of a predecessor corporation or other
    business entity” may be “subject to liability for harm to persons or property
    caused by the successor’s failure to warn of a risk created by a product sold or
    distributed by the predecessor”).
    “[W]hen an appeal presents an unsettled question of state law, we must
    ordinarily ‘attempt to predict how [the] highest court would interpret [the
    31
    issue].’” Belnap, 844 F.3d at 1295 (quoting Cornhusker Cas. Co. v. Skaj, 
    786 F.3d 842
    , 852 (10th Cir. 2015)). However, “[a]s a federal court, we are generally
    reticent to expand state law without clear guidance from its highest court.”
    Taylor v. Phelan, 
    9 F.3d 882
    , 887 (10th Cir. 1993); accord Schrock v. Wyeth, Inc.,
    
    727 F.3d 1273
    , 1284 (10th Cir. 2013). This reticence causes us to decline to
    definitively opine in the first instance on whether a post-sale duty to warn applies
    under Utah law in the context of sellers like Wal-Mart: more specifically, we do
    not reach this question because we need not do so to resolve this case; even
    assuming arguendo such a duty does apply, the Groesbecks cannot prevail on
    their claim predicated on it. See, e.g., PDK Laboratories v. U.S. DEA, 
    362 F.3d 786
    , 799 (D.C. Cir. 2004) (Roberts, J., concurring in part and concurring in the
    judgment) (noting that “if it is not necessary to decide more, it is necessary not to
    decide more”); accord Valley Forge Ins. Co. v. Health Care Mgmt. Partners, Ltd.,
    
    616 F.3d 1086
    , 1094 (10th Cir. 2010).
    As the guidepost for the post-sale “duty to warn standard” in the successor
    context, the Utah Supreme Court looked to the R ESTATEMENT O F T ORTS (T HIRD ).
    See Tabor, 168 P.3d at 818. We feel comfortable predicting that Utah’s highest
    court would do so again, were it to define the relevant standard for such a duty in
    the context of a seller like Wal-Mart. See Herrod, 886 F. Supp. 2d at 1277
    (applying the R ESTATEMENT O F T ORTS (T HIRD ) standard for a post-sale duty to
    warn in the seller context); Dowdy, 
    2011 WL 6151432
    , at *3 (same). Thus, we
    32
    focus on section 10 of the R ESTATEMENT O F T ORTS (T HIRD ), which provides:
    (a) One engaged in the business of selling or otherwise
    distributing products is subject to liability for harm to persons or
    property caused by the seller’s failure to provide a warning after
    the time of sale or distribution of a product if a reasonable person
    in the seller's position would provide such a warning.
    (b) A reasonable person in the seller’s position would provide a
    warning after the time of sale if:
    (1) the seller knows or reasonably should know that the
    product poses a substantial risk of harm to persons or
    property; and
    (2) those to whom a warning might be provided can be
    identified and can reasonably be assumed to be unaware of
    the risk of harm; and
    (3) a warning can be effectively communicated to and
    acted on by those to whom a warning might be provided;
    and
    (4) the risk of harm is sufficiently great to justify the
    burden of providing a warning.
    
    Id.
     § 10. The Herrod decision based its ruling on the section 10 standard, see 886
    F. Supp. 2d at 1277; so, in turn, did the district court here.
    That court determined that the Groesbecks failed to raise genuine disputes
    of material fact concerning the second and third elements. More specifically, the
    court noted that the Groesbecks “refer only to deposition testimony that Wal-Mart
    33
    could identify consumers who bought the Bumbo Seat online” but that this
    evidence was “irrelevant” because the Groesbecks purchased their seat in a brick-
    and-mortar Wal-Mart store. Aplts.’ App., Vol. IX, at 2066 (emphasis added).
    Furthermore, the court found that the Groesbecks had offered “no evidence” that
    indicated such in-store posting “by Wal-Mart would sufficiently communicate the
    warning to Plaintiffs or any other similarly situated purchasers,” nor had they
    presented authority to validate the effectiveness and legal sufficiency of such
    notice. Id.
    Generally speaking, the district court’s analysis with regard to the
    Groesbecks’ post-sale duty to warn claim is persuasive. On appeal, however, the
    Groesbecks insist that they “did, in fact, present evidence with respect to warning
    consumers who purchased Bumbo Seats in Wal-Mart stores, and not just with
    respect to online purchasers.” Aplts.’ Opening Br. at 49. Insofar as the
    Groesbecks advance this argument to establish that the district court was wrong in
    finding that they cannot satisfy the second element of section 10, the record
    fatally undercuts their position. The Groesbecks did not argue before the district
    court that Wal-Mart could identify—and, thus, communicate with—consumers
    that previously had bought Bumbo Seats in its brick-and-mortar stores, much less
    present evidence to this effect. Their sole argument regarding the identification
    of prior Bumbo Seat purchasers in the district court was that “Wal-Mart could
    identify and communicate with customers who bought recalled products on line.”
    34
    See Aplts.’ App., Vol. VI, at 1240. Furthermore, even at this late stage of the
    proceedings, the Groesbecks are apparently unable to identify any record evidence
    to support their view that Wal-Mart could identify those consumers who
    previously purchased Bumbo seats at brick-and-mortar Wal-Mart locations;
    notably, the citations in the Groesbecks’ opening appellate brief relate to the
    online identification and communication argument that they previously made to
    the district court, and nothing more.
    The Groesbecks do re-urge their argument that “Wal-Mart communicates
    product recalls to purchasers by posting the recall notices in the stores from which
    the product was purchased,” and they reason that a “reasonable jury could infer
    from this evidence that Wal-Mart could have utilized the same method . . . to
    provide continuing warnings to those who purchased Bumbo Seats in Wal-Mart
    stores.” Aplts.’ Opening Br. at 49–50. However, even assuming that the
    Groesbecks have accurately described Wal-Mart’s recall-notice practices, they fail
    to meaningfully engage with the district court’s reasoning—viz., they fail to
    explain why any such postings would be an effective communication device for
    product-defect warnings, and their argument is devoid of supportive legal
    authority. Accordingly, the Groesbecks fare no better here than they did in the
    district court.
    In sum, we conclude that the district court’s entry of summary judgment
    35
    was appropriate on the Groesbecks’ negligence claim against Wal-Mart for
    violation of the purported post-sale duty to warn. 11
    2
    We next address the Groesbecks’ argument that the district court erred in
    granting summary judgment on their negligence claims against Bumbo for design
    defect and failure to warn. Challenging the district court’s decision, the
    Groesbecks raise essentially the same arguments and theories they asserted with
    regard to their strict-liability claims. We again reject these arguments, largely for
    the reasons set forth supra.
    a
    Under Utah law, a negligence claim for design defect requires a duty of
    reasonable care owed to the plaintiff by the defendant, a breach of that duty which
    caused the claimed injuries, and resultant damages. See Niemela, 
    263 P.3d at 1198
    ; Slisze v. Stanley-Bostitch, 
    979 P.2d 317
    , 320 (Utah 1999) (concluding that a
    plaintiff can “simultaneously bring a negligence and a strict liability claim,” and
    applying the well-known negligence standard); Barson ex rel. Barson v. E.R.
    11
    Because we discern no basis to sustain the Groesbecks’ ordinary
    negligence claim against Wal-Mart, we likewise agree with the district court’s
    entry of summary judgment on the Groesbecks’ gross negligence claim. See
    Pearce v. Utah Athletic Found., 
    179 P.3d 760
    , 767–68 (Utah 2008), abrogated on
    other grounds by Penunuri v. Sundance Partners, Ltd., --- P.3d ----, 
    2017 WL 3697701
     (Utah 2017) (explaining that gross negligence requires substantially more
    proof than ordinary negligence).
    36
    Squibb & Sons, Inc., 
    682 P.2d 832
    , 835 (Utah 1984) (applying the traditional
    negligence analysis in a products-liability case). In assessing the existence of a
    duty of care, Utah courts consider: “(1) the extent that the manufacturer could
    foresee that its actions would cause harm; (2) the likelihood of injury; (3) the
    magnitude of the burden [borne from] guarding against [the harm]; and (4) the
    consequences of placing the burden on the defendant.” Slisze, 979 P.2d at 320
    (citing AMS Salt Indus. v. Magnesium Corp. of Am., 
    942 P.2d 315
    , 321 (Utah
    1997)); see also Niemela, 
    263 P.3d at
    1198 (citing and applying the framework of
    Slisze and AMS Salt Indus., and explaining a manufacturer’s duty to eliminate any
    unreasonable risk of foreseeable injury).
    Our disposition of the Groesbecks’ strict-liability claim for design defect
    sounds the death knell of the Groesbecks’ parallel negligence claim. Although
    the Utah Supreme Court recognized in Slisze that a product-liability plaintiff
    could simultaneously pursue negligence and strict-liability claims, the Slisze court
    emphasized that Utah law imposes “no duty to make a safe [product] safer,” and
    does not “requir[e] manufacturers to discontinue manufacturing less safe but
    [still] non-defective products.” 979 P.2d at 320 (first alteration in original)
    (quoting Ruff v. Cnty. of King, 
    887 P.2d 886
    , 891 (Wash. 1995)). Even more
    importantly, the Slisze court stressed that negligent design claims should be
    evaluated under the statutory standard for a strict-liability claim. See Henrie, 
    502 F.3d at
    1236–37 (describing the overlapping inquiry under Utah law “between an
    37
    unreasonably safe design and a negligent design,” and affirming the entry of
    summary judgment on negligence claims, because “there is no duty to make a safe
    product safer and because the [challenged product] was not defective under” the
    unreasonably dangerous analysis). Thus, a negligent design must also be an
    unreasonably dangerous design. See 
    id.
    The Groesbecks support their negligent-design claim exclusively on the
    (now-rejected) evidence used to support their strict-liability claims. Specifically,
    they press the theory that Bumbo acted negligently by manufacturing a product
    that created a foreseeable risk of injury. The Groesbecks’ theory, however,
    amounts to little more than an argument that Bumbo negligently designed the
    Bumbo Seat given the availability of a safer alternative design, despite the Bumbo
    Seat’s failure to meet the statutory standard for an “unreasonably dangerous”
    product. In other words, the Groesbecks urge us, contrary to Slisze, to impose a
    duty to make the Bumbo Seat safer. Slisze—as we have previously
    recognized—directly forecloses such reasoning. See Henrie, 
    502 F.3d at 1237
    (noting that “because there is no duty [under Slisze] to make a safe product safer
    and because the fixture was not defective under the consumer expectation test in §
    78–15–6, the district court correctly granted summary judgment” on the plaintiff’s
    negligence claim); Brown, 
    328 F.3d at 1283
     (applying Slisze to a negligent-design
    claim that mirrored the plaintiff’s strict-liability claim, and affirming the district
    court’s entry of summary judgment).
    38
    As a result, we conclude that the district court’s entry of summary
    judgment was appropriate on the Groesbecks’ negligence claim against Bumbo for
    design defect, and turn to the Groesbecks’ negligence claim against Bumbo for
    failure to warn.
    b
    As with their negligent-design claim, the Groesbecks premise their
    negligent failure-to-warn claim on the same evidence as their strict-liability claim.
    Our conclusion under the strict-liability rubric therefore applies equally to the
    substantively identical negligence and gross-negligence claims. Stated succinctly,
    we conclude that the Groesbecks fail to raise a triable factual issue on their
    negligence and gross-negligence claim against Bumbo for failure to warn, because
    the warnings were adequate as a matter of law. For that reason, we conclude that
    the district court’s entry of summary judgment was appropriate on the
    Groesbecks’ negligence claim against Bumbo for failure to warn.
    IV
    Finally, we address our appellate jurisdiction over the Groesbecks’s
    challenges to the district court’s award of costs.
    In the aftermath of the district court’s summary-judgment decision, Bumbo
    and Wal-Mart sought an award of costs under Federal Rule of Civil Procedure
    54(d). On October 6, 2015, the Groesbecks filed their Notice of Appeal from the
    39
    district court’s summary-judgment decision, together with a separate opposition to
    the application for costs. The district court awarded $31,684.32 in costs, and the
    clerk of court entered a corresponding judgment on December 22, 2015. The
    Groesbecks, however, never filed a new or amended notice of appeal, nor do they
    address our jurisdiction in their appellate briefing. Rather, in their appellate
    briefing, the Groesbecks tacitly assume that we have jurisdiction over the costs
    award, and then challenge the award on its merits. We lack jurisdiction, however,
    over this aspect of the Groesbecks’ appeal.
    Federal Rule of Appellate Procedure 3(c)(1)(B) requires a notice of appeal
    to “designate the judgment, order, or part thereof being appealed,” Fed. R. App.
    P. 3(c)(1)(B), and those designations circumscribe the scope of our appellate
    review, see Cunico v. Pueblo Sch. Dist. No. 60, 
    917 F.2d 431
    , 444 (10th Cir.
    1990). Nevertheless, “our jurisdiction will not be defeated if other papers [like, a
    docketing statement or opening appellate brief] filed within the [thirty-day] time
    period for filing the notice of appeal provide the ‘functional equivalent’ of what
    Rule 3 requires.” Denver & Rio Grande W. R.R. Co. v. Union Pac. R.R. Co., 
    119 F.3d 847
    , 849 (10th Cir. 1997) (quoting Torres v. Oakland Scavenger Co., 
    487 U.S. 312
    , 317 (1988)).
    The underlying proceedings here plainly reveal that we lack appellate
    jurisdiction over the district court’s award of costs. Simply stated, the
    40
    Groesbecks filed no new or amended notice of appeal following the district
    court’s judgment of costs, and their opening brief (filed March 1, 2016) cannot be
    treated as the functional equivalent of a notice of appeal, because it came more
    than thirty days after the district court’s judgment for costs (entered December 22,
    2015). Accordingly, we lack jurisdiction to consider the costs award on appeal.
    See Fed. R. App. P. 4(a)(4)(B)(ii); see also Art Janpol Volkswagen, Inc. v. Fiat
    Motors of N. Am., Inc., 
    767 F.2d 690
    , 697 (10th Cir. 1985) (explaining that a
    “separate notice of appeal is . . . required to obtain review” of an attorneys’ fees
    determination that follows a judgment on the merits).
    V
    Based on the foregoing, we AFFIRM the district court’s judgment.
    ENTERED FOR THE COURT
    Jerome A. Holmes
    Circuit Judge
    41
    Appendix A
    See Aplts.’ App., Vol. II, at 316–19 (Bumbo’s Mot. for Summ. J., filed Sept. 30, 2014).