The Bestinnkits coffee mug warmer solves this problem. There are no bells and whistles—simply plug it in and place any mug on top. The gravity induction feature automatically turns on as long as ...

350ml /12 oz Coffee Mug Warmer for mixing hot or cool drinks. You will get 1 coffee cup with lid and rotor , 1 type-c cable and 1 manual. Thermostatic coffee cup dimension: 3.4in * 3.4in * 5.3in.