Joe Traveller 80-23512 Heated Stainless Steel 12 Volt Travel Mug Holds up to 16 oz. of liquid Thermostatic control maintains a temperature of 140 Degree Fahrenheit (60 Degree Celsius) Plugs into your car's cigarette lighter with included 12V adaptor and 39-37/100-Inch cable Ergonomically designed for cup holders (fits most vehicles) Heat-retaining airtight lid and slide lock safety strip keeps drink warm and prevents spillage