PERFECT FOR PROTEIN SHAKES & SUPPLEMENTS: The perfect shaker for mixing your protein shakes and preworkouts in a matter of seconds. ULTRA SMOOTH SHAKES: It comes with a built-in mesh grid that sits in the neck of the shaker and helps create its trademark ultra smooth, clump-free shakes. 700ML CAPACITY: Optimal 700ml capacity, and an easy reference measuring guide, it can handle pretty much any shake from our extensive range. PREMIUM QUALITY: This shaker is versatile and durable, made from high quality plastic, giving it a robust and rigid structure. It's also BPA free. SCREW LOCK TECHNOLOGY: Unlike most shakers on the market today, the Sleakster doesn’t use a click-to-close mechanism on the spout. Instead it uses a logical screw closure to ensure zero leaks.