Fitness Bottles (Set of 2) Pre and Post Workout Shaker Bottle Set with Stainless Steel Wire Whisk Ball Made of high-quality BPA- and Phthalate-free materials Holds up to 20 ounces each. Perfect for protein shakes, eggs, fiber drinks, smoothies, pancakes and more Graduated measurements on side include markers up to 400mL and 12oz Seals in powders, mixes, and liquids with screw-on cap Stainless steel ball wire whisk breaks up powders and chunks for smooth results!