Hot Cold Double Wall 18/8 Stainless Steel Vacuum Insulated, Copper Lined Thermal Tumbler 16 oz. - Pink 16oz. Double Wall 18/8 Stainless Steel Copper Vacuum Insulated Thermal Tumbler. Enjoy up to 8 hrs Hot or 16 hrs Cold use. All Metal Body construction. Matte Finish painted exterior Stainless body, with Stainless Interior and metal base. Threaded, with one-touch lock and release flip up, drink spout lid. Copper plated interior inner wall prevents heat from entering the double walls by thermal radiation. Mouth Opening large enough for easy filling, drinking & cleaning. Dimensions: 2.75" base diameter, 2" mouth opening, 9.75" height Hand Wash Recommended, due to Individual Dishwasher Temperature and Abrasiveness Variations that may cause damage to the exterior paint finish and plastic components of the tumbler.