Feature: Automatic mixing technology: using automatic fluid mixing technology, it is different from any other self-stirring cup. Get a quality fluid motor with the push of a button. Easy to clean: If you don't need the mixing function, our stainless steel coffee cup can be used as a normal drinking cup. It is also easy to clean, but do not use the dishwasher or completely soak for cleaning. Easy to operate: Just press the auto mix button on the cup and the bottom propeller will spin to mix the solute and solvent particles into a cute foam. No sweat, no trouble, just a product that makes mixing drinks easier. Safe and portable: This new generation automatic mixing cup is the best way to automatically mix hot or cold drinks! The leak-free twist open/close cover allows you to bring drinks from the kitchen to the living room, bedroom, car, office, gym, school, etc. Specification: Material: Stainless steel + High quality ABS. Color: White,Black,Yellow,Pink Capacity: 400ml Power supply: 2x AAA batteries. (Not included) Package Included: 1x Stainless Steel Mixing Cup.