Smooth Inner Wall. 22 Oz. Double Wall Tumbler. Durable Tritan™ Material. BPA Free. Meets FDA Requirements. Proposition 65 Compliant. Does Not Retain Odor Or Taste. Top Rack Dishwasher Safe. Decoration Is Inserted Between The Clear Double Walls Of The Tumbler Then Ultrasonically Sealed To Provide Double Wall Insulation. Freezer Safe. Made In The USA. Reduces Condensation Eliminating The Need For Coasters. Keeps Cold Drinks Colder Longer And Hot Drinks Hotter Longer. Optional Lid And Matching Straw. Impact And Shatter Resistant. Double Wall Construction For Insulation Of Hot Or Cold Liquids.