Want a high-protein drink but don\'t want to mix up your usual shake? Try the Optimum Protein Shake which comes in a handy ready-to-drink 330ml or 500ml bottle. Each 330ml bottle is packed with 25g of protein. Ideal as an on-the-go high protein drink, or post exercise. Available in 3 great-tasting flavours. Want a high-protein drink but don’t want to mix up your usual shake? Try the Optimum Protein Shake which comes in a handy ready-to-drink 330ml or 500ml bottle. Each 330ml bottle is packed with 25g of protein. Ideal as an on-the-go high protein drink. Available in 3 great-tasting flavours. Ready-to-drink protein shake. 25g of protein per 330ml bottle. Only 14g of carbohydrate and 168 per 330ml bottle. Available in 3 different flavours. Available in 330ml and 500ml bottles Optimum Protein Shake by Optimum Nutrition. Available at Body & Fit! Fast international delivery to 30+ countries.