Keep your hot drinks even hotter with the USB Warming Insulation Cup Coaster Powered through USB, meaning you can plug it straight into your computer at your desk A great gift for any workaholic or coffee addict. Keeps your tea or coffee at 40 degrees Uses insulation and hot air to keep your drink warm  Power: 2.5W, 5V DC Materials: plastic and aluminium alloy Dimensions: 10cm x 9cm x 2cm Save 70% on the USB Warming Insulation Cup Coaster - now 5.99 pounds