Constant temperature heating coaster set with 420 ml mug

【Easy to Use】Just place the mug on the heating pad and plug in the power supply. The automatic temperature control function keeps your drinks at the perfect temperature. This thermostatic coaster meets various modern household needs, ideal for keeping coffee, milk, water and other beverages warm. Compact and stylish design fully meets daily warming needs. 【Thermostatic Coaster Compatibility】Fits cups of various sizes. Ensure the cup bottom fully contacts the heating surface. Not suitable for plastic cups or double vacuum insulated cups. Compatible with flat-bottom ceramic, glass, paper, stainless steel mugs and baby bottles.