USN’s Tornado Shaker Has Been Designed To Mix Easily Without Unwanted Leaking. Why Tornado Shaker The measurements on the side makes it easy to mix your shake precisely. Keep your powder and capsules in the screw-on sections. Potential Benefits of Tornado Shaker BPA Free Leak Free Screw-On Section for Powder/Capsules 650 ml Capacity with 150 ml Dry Storage