Introducing Our Stainless Steel Metal Copper Vacuum Thermal Insulated Tumbler, a Stylish & Practical Choice for Daily Drink. Made of Stainless Steel Metal, This Tumbler Features Double-wall Insulation with Copper Vacuum Insulation for Temperature Retention. It Comes with a Clear Transparent Push-on Lid with Sliding Closure & a Synthetic Cork Base, Adding a Touch of Sophistication. Unisex & Suitable for Daily Use, This Tumbler is a Versatile Companion for Your Beverages. Complying with Prop 65 Standards, It Measures 4.63 Inch W x 4.5 Inch H & has a 12 Oz. Capacity.