• High-quality materials: the mug warmer is made of high-quality aluminum and magnesium alloy and a heat-resistant tempered glass panel. • Safe to use: the heating coaster has a certain degree of water resistance. • Waterproof panel: do not worry about accidentally spilling liquid on the heating plate. • Wide range of applications: suitable for heating and keeping tea, coffee, cocoa, milk, and other beverages warm. • The ideal gift: designed to keep your drinks at a constant temperature for a long time.