Tornado Double Wall 18/8 Stainless Steel Thermal Pilsner Tumbler, Vacuum Insulated, Copper Lined , 16oz. Capacity - Stainless 16oz. Double Wall 18/8 Stainless Steel Copper Vacuum Insulated Thermal Pilsner Tumbler. Enjoy Hot or Cold use. All Metal construction. Brushed Stainless exterior Stainless body, with Stainless Interior and metal base. Elegent, Ergonomic & Durable design incorporating excellent fit and finish from high quality grade materials. 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: 2.5" base diameter, 2.5" mouth opening, 7.75" height Hand Wash Recommended, due to Individual Dishwasher Temperature and Abrasiveness Variations that may cause damage to the exterior finish of the tumbler.