☕The spill-free twist open/close lid lets you take your drink from your kitchen to the lounge, bedroom, car, office, gym and school. To operate, simply press the button once to start the automatic stirring. Press it again to stop the stirring. Ideal for coffee, tea, hot chocolate, milk, protein shakes, lemonade, bouillon and many other light mix drinks that need stirring. Powered by two AAA batteries.