In September 2019, a false advertising class-action lawsuit was filed against Tristar Products regarding the marketing for Copper Chef Signature and Copper Chef Diamond Cookware. Specifically, plaintiffs claim that the marketing for the pans promises that the non-stick coating on them lasts a lifetime and nothing sticks to the pans when, according to the complaint, the non-stick coating does not last and food begins to stick to the pans after a short period of time. (Slutsky et al v. Tristar Products, Inc., Case No. 19-cv-6043, N. D. IL.)

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