Pro32: Double Wall, Insulated Vacuum, Consdensation Free Tumbler. 18/8 Food Grade Stainless Steel Exterior with Drink Through Frosted Acrylic Lid., Stainless Holds 32-ounces Vacuum Insulation Keeps Hot Liquids Hot and Cold Liquids Cold for Hours Compare to Leading Brands Frosted Drink-Through Push-on Acrylic Lid Hand wash only Rugged and Durable