Automatic Mixing Magic: Easily mix chocolate powder or syrup into your milk with the motorized nylon stirring paddle that creates a powerful vortex, ensuring a perfectly blended drink every time. Safe and Kid-Friendly Design: Tested for safety and durability, this 16 oz tumbler is 100% finger-safe, featuring a no-spill sip lid and a dishwasher-safe removable wall for easy cleaning. Portable and Convenient: Lightweight and easy to carry, this mixer includes a spill-resistant travel lid, making it perfect for on-the-go use. Requires 2 x AA batteries (not included). Easy to Use & Clean: Simply press the button to mix, then enjoy your drink right from the same cup. The detachable base and dishwasher-safe tumbler make cleanup a breeze! Makes a Great Gift: Perfect for holiday, birthday, grab bag and Christmas gifts!