Package and size: you will receive 12 pieces of wire whisk balls, which measures about 1.18 inches in diameter, proper size is suitable for most bottles, enough amounts can meet your daily use and replacement needsReliable material: these milkshake protein shakers are made of quality stainless steel material, strong and durable, non-toxic and odorless, not easy to rust and break, easy to wash, which can be kept for a long timeEasy to use: the bottle cup mixer is convenient to use, you just need to drop a mixing ball into your bottle and shake it uniformly to dissolve your drink more totally, and simply rinse with water to keep it clean after usingPractical design: coiled by a whole stainless steel wire, the shaker ball is delicate and smooth, which has sufficient contact areas when you put it into the drinks or powders, helping them mix and dissolve thoroughly, saving your time and energy to mix themApplicable ranges: the stainless steel mixer balls can be applied to mix juice, protein powder, milkshakes, whisky, milk and other drinks, they are important kitchen tools for home, cafe, or bar, and an ideal gift that can be sent to your friends at the housewarming party