Supersize your post-workout smoothies with our Grey & Black Speckled Protein Shaker. This shaker features a rougher, textured finish for improved grip. With a total capacity of 735ml, this sizeable protein bottle does all the heavy lifting for you, so you can concentrate on building a better body and fuelling your workouts with your preferred whey or vegan protein drink.. Engineered in professional grade stainless steel, our Grey & Black Metal Protein Shaker is durable, easy to clean, and 100% BPA-free. It is double insulated to keep your drinks hot or cold for hours, and it has an innovative smart-shaker ball for smooth, silky protein shakes every time. A leak-free lid allows you to take this shaker bottle on the go, while an integrated carry loop ensures it's always close to hand.