Ideal Gift for this cold winter This coffee mug warmer is a great gift for lover, dad, mom, wife, husband and all your loved ones on Valentine's day, Christmas and New Year. Optimal Temperature Use this coffee cup warmer to keep or warm up the liquid temperature to as high as 131/55, keep this temperature whole day, which comfortable temperature , enjoy at your leisure. (Note: 131/55 is best for drink ) Suitable for Most Cups This Electric Mug Warmer is suitable for ceramic tableware, stainless steel cup, mug, milk box, glass cup, etc. (Plastic cups cannot be used for heating.) Auto ON/OFF Function Coffee mug warmer with gravity sensing device - Just Put your mug on and the coffee cup warmer will work auto, take it away, the cup warmer will off auto. Safe, Durable & Noiseless Our products use waterproof toughened glass, which is safe, waterproof and easy to clean. There is no noise during use and will not affect your work.