Stainless Steel Outer With Powder Coated Finish And Stainless Steel Inner | Double Wall Construction For Insulation Of Hot Or Cold Liquids | Snap-On, Spill-Resistant Thumb-Slide Lid With Rubber Gasket | Due To Vacuum Insulation Technology, Capacity Is 18 Oz. With Lid On | Keeps Drinks Hot Or Cold Up To 6 Hours | Non-Skid Rubber Bottom | Meets FDA Requirements | BPA Free | Hand Wash Recommended