Extreme Fitness Stainless Steel Protein Shaker with Metal Ball Whisk and Built in Agitator (30oz) Metal Ball Whisk and Built in Agitator: will make a great tasting protein shake without any clumps. Made from BPA Free Plastic and High Quality Stainless Steel. This 30 oz non-toxic bottle is easy to use and easy to clean. It is dishwasher safe. Includes clear indentations on the sides for accurate and precise mixing of your favorite supplement powders or mixed drinks. You Can Take It Anywhere! Making it great for yoga, after strength training workouts, your cardio workouts, or simply as your everyday water bottle. 100% Satisfaction Guarantee. We offer 100% money back guarantee if you are not satisfied with our product.