Thermostatic mug set, 400ml mug with lid

【Easy to Use】Just put the mug on the heater and plug in the power cord. The built-in auto temperature control keeps your drinks at a perfect warm temperature. This heating coaster fits all kinds of daily home use, great for warming coffee, milk, water and other drinks. It has a compact, stylish look to meet all your daily heat preservation needs. 【Coaster Matching Notice】Works with mugs of different sizes. Make sure the cup bottom fully touches the heating surface. Do not use plastic cups or double-layer vacuum cups. It fits flat-bottom ceramic cups, glass cups, paper cups, stainless steel mugs and baby bottles.