4pcs Stainless Steel Spring Balls Shaker Cup Balls Mixing Wire Whisk Balls Protein Mixing Balls for Shaker Cup Mixer

Material: made of 304 stainless steel, durable and healthy, SHAKE BALL: Fits most sizes of cups or bottles for easy mixing of protein powders.This shaker ball ensures that the nutrients dissolve more completely and quickly., Easy To Use:Suitable for most bottles with lids, place the stainless steel cylinder into the bottle and close the lid, then shake evenly., Easy To Clean: Very easy to clean, hand wash or machine washable, Size: 1.96'' x 1.77'', Includes Package: 4 shaker Balls