Coffee, tea, or any hot beverages are best enjoyed at your own leisure. The ionMug & Charging Coaster in black helps you do that by keeping your drinks at the perfect temperature all day from its charging coaster. Once charged, the mug is designed to hold its temperature for up to 3 hours, so no more racing against the heat of your drink and no more turning to the microwave for reheating. It's the perfect size too at 3.5" x 5", and weighing only 1 lb. With multiple temperatures, an auto shut-off feature, a spill-proof warming lid, and more-the ion Mug is your go-to cup for any hot beverage!