The Tornado Bottle™ makes it easy to mix your favorite drinks anywhere, anytime! Just push the button and the special Vortex Mixing System spins like a "tornado" to thoroughly mix juices, protein shakes, coffee, tea, cocktails, chocolate milk, baby formula and more. Features an anti-spill lid with a non-leak seal and a rubberized base for stability. It's self-cleaning – just add water and dish soap and mix. Perfect to take to the office, gym, school and more, it fits easily into bags, purses and cup holders. BPA free. Plastic and rubber. Req. 2 "AAA" batteries (sold separately). Holds 20 oz.