Made of stainless steel with vacuum insulation,lock temperature to preserve flavour and freshness, keeps your beverages hot up to 12 hours or cold up to 24 hours (The heat preservation effect is affected by the environmental temperature and the amount of beverage inside) Leak Proof : Its lid is designed with a new insulated and air-tight structure, larger size and dual silicon rings , always locks in the correct place. Even with a slight tilt , this thermal coffee carafe will not leak one single drip.