6 Pack Stainless Steel Mixing Balls For Protein Blender Replacement Wire Whisk Shaker For Cup Bottles Quantity: 6Pcs= Large*2+ Medium*2+Small*2 Material: Made of high quality food grade 304 Stainless steel, clean & durable & healthy. Function: With shaker bottle/cup, this stainless blender mixing ball help to make your nutrition dissolve more thoroughly and quickly. Ensure you to taste more yummy drink and enable your body to absorb enough nutrition. Compatibility: Three sizes of shaking balls will be the best choice for all size of bottoms. Tips: Put the small shaker ball inside the large ball and you will get better mixing. Reusable & Portable & Easy to clean: With our special storage box, you can easily carry these mixing balls to everywhere. After using, you just need to rinse the ball with water.