-Convenient 3 pack of shaker balls - works with nearly every mixer bottle and protein shaker -Works perfectly with protein powders, diet shakes, healthy greens, milkshakes or even whipped cream -Light, springy, free flowing whisk ball - easier to clean than most shaker ball for protein shakes -Electropolished stainless steel ball whisk will never rust, chip or splinter. FDA food grade. -Each protein shaker ball is 2 inches in diameter and 1.8 inches in height. Will fit most bottles https://www.amazon.com/Blender-Whisk-Shaker-Ball-Balls/dp/B07NHXY5GT