Tervis insulated drinkware delivers the ultimate combination of personality and performance for pure drinking enjoyment. Now with our new Duraprint technology. Tough, brilliant, and durable, no more chipping and flaking! Tervis stainless steel tumblers feature double-wall vacuum insulation, reduce condensation and keep drinks hot for up to 8 hours or cold for up to 24 hours. Copper-lined 18/8 stainless steel construction is durable and material won't retain tastes or odors. Stainless steel tumblers are dishwasher safe, feature a 2-year guarantee, and are designed in Venice, FL. Includes quiet, non-slip base and leak resistant, easy-close slider lid.