Keep your coffee or tea hot from your car to your desk. Suffering through a cup of lukewarm java or microwaving your tea just doesn't cut it anymore. The 12V/USB Travel Mug features a stainless steel interior and exterior, and an ergonomic design to fit standard cup holders. With a 500 ml capacity, you can plug this travel mug into your vehicle's 12 volt plug to keep your drink piping hot no matter where you go. The USB plug feature also allows you to plug this mug into any USB port to maintain the warming feature.