Coffee Mug Warmer, USB Desktop Cup Warmer,Electric Beverage Heater Aluminum Plate with Dark Walnut Wood Trim for Office/Home Use High Quality: Made of only the finest material. It is a aluminum plate with dark walnut wood trim around the edges Portable: Diameter 4 inches,so it can be brought anywhere when needed Easy to Use: Just plug it in and turn it on. Comes with an on/off switch indicator light as well Wide Application: Works great with coffee, tea, hot chocolate, and other hot beverages,keep them at 75-80 degrees centigrade Note: This beverage warmer is not designed to heat up drinks. It is only designed to keep drinks warmer for longer periods of time