Optimum Nutrition Shaker 600ml. 600ml Capacity. Stainless Steel Mixing Ball. Leak-Proof, Screw-Top Lid. The Optimum Nutrition Shaker provides a 600ml capacity complete with stainless steel mixing ball to effortlessly blend your choice of powder from Gold Standard Whey to Amino Energy.. Available in Jet Black with the Optimum Nutrition logo embossed in White on one side. Additional features include a leak-proof, screw-top lid. The Shaker is BPA and DHEP Free.