Always we need to shake our Cup/Mug to take better taste of Coffee/Tea or Soup and some time its make problem like our shirts and clothes become Dirty. this Auto stir mug will solve your problem Used to automatically stir coffee, tea, hot chocolate, soups etc. No water leaking into battery base when filled with water. Inner material of healthy PP, high temperature resistance. Outer material of stainless steel, durable and shining. One plastic ring around the lid for lidding tightly. Powered by 2 AAA batteries (not including). One button for power-on. Specifications:Material: PP, stainless steel, Capacity: 350ml, Power: 2 AAA batteries (excluding) Product weight: 255g / 9oz.