yofan 3 pack milkshake protein shaker ball, food grade 304 stainless steel wire mixer mixing whisk ball for protein shakes yofan® yofan 3 pack milkshake protein shaker ball , food grade 304 stainless steel wire mixer mixing whisk ball for protein shakes replacement includes 3 whisk ball which are easy to clean and never rust.</p> </p> </p> </p> yofan whish ball makes most of your bottles into shaker cups.</p> </p> </p> </p> this shaker ball is made of food grade 304 stainless steel,healthy,durable and never rust</p> </p> </p> </p> don't worry of shaker balls' being lost-you will get 3 yofan whisk balls at a time</p> </p> </p> </p>