Advertising Watchdog Recommends Grove Bags Modify Cannabis Packaging Claims

NEW YORK — The National Advertising Division (NAD) of BBB National Programs on May 14, 2026, recommended that Kinzie Advanced Polymers, LLC, which operates as Grove Bags, modify or discontinue several advertising claims for its TerpLoc® cannabis storage products. The decision followed a challenge brought by a direct competitor, Calyx Containers, LLC, scrutinizing claims related to humidity control, product preservation, and weight retention. The ruling affects marketing materials for Grove Bags’ specialized packaging, which is designed for curing and storing cannabis. At issue were express and implied claims made across multiple media channels suggesting the bags could create a perfect microclimate, ensure terpene preservation, and prevent mold. The NAD, a key self-regulatory body for the advertising industry, found that some of these claims were not sufficiently supported without significant qualification. For businesses in emerging industries like cannabis, this ruling is a critical reminder that aggressive marketing claims can attract unwanted attention from both competitors and regulators. The cost of defending against an advertising challenge, coupled with the potential expense of revising marketing materials and the associated reputational damage, can be substantial. This incident highlights the necessity of embedding compliance and risk assessment directly into a company's growth strategy. In our experience, many small and mid-sized companies prioritize product development and sales over proactive legal and regulatory review, leaving them vulnerable. A robust framework for financial risk management involves not just insuring against obvious liabilities but also stress-testing marketing language and operational claims before they go to market. This proactive approach is essential for sustainable growth and avoiding costly, distracting disputes. C&S Finance Group LLC helps clients build these frameworks; you can learn more at csfinancegroup.com. In its detailed decision, the NAD determined that while Grove Bags provided a reasonable basis for some of its performance claims, others overpromised the product's capabilities. Specifically, the NAD found that testing submitted by Grove Bags supported the assertion that TerpLoc® packaging functions as an effective passive modified atmosphere packaging (MAP) system. This system can maintain moisture stability and preserve cannabinoids and terpenes more effectively than conventional storage methods, but only when specific instructions for use are followed. The division concluded that these instructions are “material terms” that must be clearly and conspicuously disclosed alongside any performance claims. The NAD recommended that Grove Bags discontinue unqualified claims that its products will “create” a specific microclimate or “ensure” weight retention and terpene preservation. The regulatory body found the evidence did not prove that the packaging consistently maintains a precise relative humidity range of 58–62% under all possible conditions, as some advertising implied. Furthermore, the NAD determined that the advertisements did not reasonably convey the implied message that the packaging could regulate humidity to the target level regardless of the initial moisture content of the product placed inside. The division recommended that Grove Bags modify its advertising to clearly state the conditions necessary to achieve the claimed results and to avoid language suggesting guaranteed or universal performance. During the proceeding, Grove Bags also voluntarily discontinued its claims related to mold prevention. According to the NAD, these claims will now be treated for compliance purposes as though the division had formally recommended their discontinuation. The challenge from Calyx Containers underscores the intense competition within the cannabis ancillary market, where packaging and storage solutions are key differentiators for cultivators and distributors seeking to preserve product quality. Both companies offer high-performance storage solutions, and marketing claims about product efficacy are central to their value propositions. In its advertiser’s statement, Grove Bags confirmed its intention to follow the NAD’s guidance, stating it “will comply with NAD’s recommendations.” The company, which launched with the goal of engineering a film specifically for cannabis preservation, previously won a Packaging Innovation Award from Dow in 2020 for its TerpLoc® technology. Moving forward, Grove Bags will need to revise its marketing and packaging language to align with the NAD's recommendations, incorporating clear disclosures about the conditions required for optimal performance. The ruling may also serve as a precedent for other companies in the cannabis packaging sector, signaling increased scrutiny of technical performance claims as the industry matures and competition intensifies.