Tornado Shaker Cup, Revolutionary Vortex Mixer in a Bottle. Portable Blender Abilities At the Gym. 16-ounce White Clear Perfect for Protein Shakes, Powder, Baby Formula, Pre-workout, Post-workout, Eggs, and Cocktails Superior mixing abilities with a new, unique portable design. Transforms the original gym accessory. 20-ounce capacity with 16-ounce recommended fill line for the anti-cyclonic rotation device To clean add water & soap then apply the leak-proof lid. Let the bottle mix until clean then rinse. Light-weight BPA free ergonomic design with a powerful motor perfect for all your supplement needs.