PROMiXX 2.0 &ndash; The World&rsquo;s Best Vortex Mixer / Blender / Shaker Bottle with X-blade Technology and Integrated Protein Storage Container. 16000rpm Lithium-ion battery. USB Rechargeable. 100% Leak-proof Guarantee. BPA-free. 600ml / 20oz The world's most powerful handheld vortex drinks mixer. Capable of speeds over 16,000RPM for the world's smoothest supplement mixes Ultra high torque Lithium-ion rechargeable motor. USB charging cable included Scientifically engineered blunt blade. Preserves micronutrients for improved protein performance Athlete tested ergonomic design with 600ml capacity; BPA and DHEA-free food-grade materials 100% leak-proof... Guaranteed! Comes complete with fully integrated NUTRiPOD supplement storage container Fully charge before first use. Once fully charged, remove charging cable Do not submerge the battery base in water. Remove when cleaning 1-year limited warranty on all PROMiXX products