The Shaker Pro 40 Supplement System. Make a perfect tasting shake every time, guaranteed optimal results. Freshly prepared shake is made without loss of taste. Powder and liquid are stored separately to be mixed together perfectly. Load the reservoir with powder, fill the large chamber with liquid, put it all together and its ready for use. Twist the center ring to release the powder and shake vigorously. The unique shape of the center chamber allows for a complete mixing action. You can use it anyplace and anytime: in your car, at work or in the locker room. No need to transport separate ingredients. Shaker Pro in an "ALL-IN-ONE" solution for everyone with an active lifestyle!