· Thermos vacuum insulation technology locks in temperature to preserve flavor and freshness to keep beverages hot for 12 hours or cold for 24· Durable 18/8 stainless steel interior and exterior withstand the demands of everyday use· Convenient twist and pour stopper makes serving simple· Built-in stainless steel cup lets you enjoy your beverage anywhere· Light and compact design for effortless transport and storage; stays cool to the touch with hot liquids and is condensation-free with cold