Come and see our amazing products. The coffee warmer is designed to keep your beverage at a constant temperature and keep this temperature the whole day, which comfortable temperature, enjoy at any time. Coffee mug warmer equipped with auto shut off switch. Just plug the adapter into the outlet, then place your mug on the warmer plate and the cup warmer will work auto, take the cup away, the cup warmer will shut off auto. The coffee cup warmer plate has no groove, so it can fit most cups, such as glass cups, stainless steel cups, Ceramic cups, etc. We recommend using the cup with a flat bottom for better heating results. Pls confirm with us about the packing info, stock color and exact production time before placing your order