【SUS 304 Stainless Steel】: Our auto stirring mug is made of SUS 304 stainless steel inner and PP shell. Double click to begin stirring various liquids.Automatic stirring 20S.Temperature display will be turned off after 1 minute.This electric stirring coffee cup can withstand both hot and cold water (direct freezing is not recommended, it can be refrigerated). 【Easy to Carry amp; Clean 】: This self mixing mug with lid suitable for office, car and home use. You can also use it when traveling or going out. The rotor is magnetically attached.The small rotor can be removed during the cleaning process, and the automatic stirring mug can be washed directly under the water tap without worrying about leakage. 【NOTE: Do not soak for cleaning, do not use in MICROWAVE or DISHWASHER.】. 【Rechargeable Automatic Mixing Mug】 : Self stirring coffee mug equip with 350mAh battery, it can be stirred 50 times after each full charge. There is no need to replace the battery, which is more environmentally friendly.The charging port is located in the hidden part of the handle,water doesn't seep into the battery area and more safer. 【Wide Application】380 ml /13 oz auto stirring coffee cup for mixing hot or cool drinks. Great for stirring coffee, milk, hot chocolate, protein powder, tea, cocoa, juices, hot water,granules and many other mildly mixed beverages. Automatic mixing cup is the best and easiest way to allow you to take beverages from the kitchen to the living room, bedroom, car, office, gym, school, etc. 【NOTE:Please do not use for thick, pasty and other solids that cannot be dissolved quickly】.