1.Package Include You will receive 7pcs milkshake protein shaker balls. An excellent choice for fitness enthusiasts who are in constantly need of adequate nutrition, or for making delicious milkshakes for kids. 2.Quality Material The shaker ball is made of food-grade PP material, durable and reusable. You can rest assured that it's safe, non-toxic and not easy to rust, just put it in your bottle and shake it gently to make it even. 3.Perfect Size The diameter of the mixing whisk ball . Shaker balls of unique design make it compatible with your various cups to achieve a perfect blend. In addition, its lightweight and portable, can be placed in a drawer or carried in your bag. 4.Easy to Use & Clean Bottle mixer ball can be easily washed with water or put in the dishwasher, convenient and simple. With it, your drinks can be fully and effectively mixed without lumps, while enjoying delicious drinks, you can get enough nutrition. 5.Multiple Uses Protein shaker ball is a great choice for mixing protein powder, milkshakes, smoothies, juices and other beverages. Perfect for most water bottles, glasses or mugs, the perfect exercise and health companion to take with you.