Thermos - Thermos vacuum insulation technology for maximum temperature retention keeps hot for up to 3 hours or cold for up to 10 hours. - Features:Durable stainless-steel interior and exterior - Compatible with most single-cup brewing systems - Exterior stays cool to the touch with hot beverages and sweat-proof with cold. Fits most vehicle cup holders - Slide lock lid is simple and easy to use slide to open and slide to close - Leak-resistant plunger lid system easily disassembles for thorough cleaning