The 12V/USB Travel Mug from Koolatron takes coffee breaks to a whole new level. Not only does double-walled vacuum insulation keep your drinks at their ideal temperature for longer, this high-tech 500 mL stainless steel travel mug includes a USB cord and 12V DC adaptor to power the low-voltage heating element on the road or right at your desk so you can enjoy your morning java all day long.
cap wouldn't seal and I don't think the heater worked well. Zev. Fri Apr 26 2024