This tumbler offers the increased level of functionality of stainless steel, and is backed by a limited lifetime warranty by Tervis. Splash-proof, shatter-proof and Easy close lid. Keeps beverages cold for 24 hours and 8 hours piping hot! Made of Premium grade copper lined 18/8 stainless steel, double wall vacuum insulation and BPA Free. Hand wash only with scratch-free sponge. Officially Licensed.