Heated 16 Oz Travel Mug for Car Automobile Travel Cup Insulated Stainless Steel 12 Volt DC Coffee Mug with Lid Keep Drinks Warm - Blue - Ideas in Life 16Oz. Heated Travel Mug keeps your favorite beverages,soups, and other liquids hot all day with its built-in heating element. Insulated stainless steel helps hold your beverages temperature for up to 8 hours when unplugged. Lock-top lid helps prevent spills and makes this mug ideal for use anywhere. Make sure lid is locked before use. DC Power cord included. Works with any automobile, boat or RV 12V DC power socket. Perfect for long trips or your morning commute, just plug in and go.