Hot & Cold Stainless Steel Tumbler with Silicone Grip - Double Wall Foam Insulated, 16oz. - Aqua A Sleek Ergonomic Design Tumbler great for the daily use of all your Hot or Cold beverage needs. Stainless Steel Outer Shell with Silicone Grip Sleeve, Plastic Inner Liner with Foam Insulation in-between. Double wall foam insulation helps maintain your desired drink temperature. Up to 4 Hours Cold, 2 Hours Hot Push on Swivel Closure Seal Lid with Silicone Gasket. Easy to Dissasemble for cleaning. Hand wash recommended. Not for microwave or freeezer use.