Angelwing Stainless Steel Automatic Coffee Tea Mixing Mug Self Stirring Mug Easy to clean and more convenient It is also suit for coffee, tea, water, milk Automatic stir, moderate strength, will not be spill for the fast speed of stirring Just placed two AAA batteries, push the button and it will automatically stir the coffee The lid has straw hole and cooling holes, very convenient for the person who loves coffee