HOW IT WORKS Simple! Add your choice of beverage or water with powder (maybe protein) and rotate the agitator using a finger with an oval handle. One rotation results in 5 powerful rotations of the agitator. Our whirl cup uses the advantage of gear and converts torque from the human muscle of the finger to a powerful vortex. REAL BLENDING/ REAL BLENDER Whirl Cup Has Actual Agitator Which Rotates And Mixes Thoroughly Every Part of Mixture. It Is Actually Small Version Of Pharmaceutical Blender. ENERGY EFFICIENT Whirl Cup Does Not Use Electricity So You Can Use At Anywhere Any Time. Camping, Driving, Office, Travelling ! Anywhere You Can Imagine. NO IMITATION What Happened To Innovation ? Some Of The Biggest Companies In Water Bottle Simply Imitating Whisk Ball While Whirl Cup Is Original, Creative & Innovative. It Has Won US Utility Patent! NO BATTERIES Whirl Cup Is Environmentally Friendly. It Does Not Require Batteries. So No Lithium, No Nickel Or No Aluminum Leaching Into Earth ! NO MORE IMITATION Everyone Is Imitation Whisk Ball. While Whirl Cup Is Fresh, Creative And Original ! Absolutely No Imitation ! QUALITY Our Cups Are Made In USA At Pennsylvania. Its BPA Free And Made Of Durable ABS Plastics Which Can Last Forever. CUSTOMER REVIEWS It came with a free blender cup to help mix the power which was a nice surprise! It works. - Andrew D. | Los Angeles, CA the blender is good. after using that blender product tastes better. Love the mixer cup! Makes my water fun! - Toko | Los Angeles, CA