Stainless Steel Drink Tumbler - Double Wall Vacuum Insulated - 18oz. Capacity for Hot and Cold Drinks (Matte Black) Double Wall Insulation Keeps Drinks Hot or Cold Longer 18oz. Capacity Double Wall Stainless Steel Tumbler Vacuum Insulated Stainless Steel Inner Liner Environmentally Friendly and BPA Free Tumbler Body is Dishwasher safe. Please hand wash lid. Not for microwave or freezer use