The automatic shut-off feature of the coffee cup warmer prevents any possible safety hazard caused by forgetting to shut it off. Please do not touch the heating area while the heater is working. MugWarmer Coffee Warmer Large Size Base, Extra large base fits most cups, mugs, carafe and bowls. Also suitable for most different cup styles and sizes, such as stainless steel cups, milk cartons, glasses, etc. Will be your favorite office gadget! Teapot with Waterproof Design: Glass waterproof panel, no need to worry about the safety of occasional water leakage. The coffee warmer is easy to use and the surface is easy to wipe clean. The versatility makes the desk coffee warmer a great gift for friends. The tea warmer will be your best gift choice to express your care to your family, lover or friends on Valentine’s Day, Thanksgiving, Christmas or other special occasions.