Thermos Stainless-Steel Vacuum Insulated Bottle Thermos double-wall vacuum insulation locks in temperature to preserve flavor and freshness; keeps liquids hot for 12 hours and cold for 24 hours durable 18/8 stainless-steel interior and exterior withstand the demands of everyday use; hand wash only Convenient twist-and-pour stopper makes serving simple Built-in stainless-steel cup lets you enjoy your beverage anywhere Bottle stays cool to the touch with hot liquids and is condensation free with cold