<p>Premium Quality Shaker Bottles for Protein Mixes: High quality plastic protein shaker bottle, special designed stainless-steel spiral spring stirrer, very good leak proof lid and flip cap. Measuring lines 500 ml / 16 oz, real capacity up to 600 ml / 20 oz.</p><p>3-in-1 Protein Shakers: Designed with a standard shake bottle and two screw-on attachments, including a powder container and sectioned pill container, we’ve made storing proteins, vitamins, and supplements even easier on the go.</p><p>Efficient Mixing: Stainless steel shaker for protein shakes use a spiral spring stirrer, which can mix the protein shake cup faster than the stirring ball, so that it will not clump while shaking it will hit the bottom so that there is no more residue on the bottom.</p><p>Portable Non-slip and Leak-proof: Our protein mixer bottle is suitable for most car cup holders and bicycle water bottle holders. It is convenient for you to carry around. The cup body has scale marks. In addition, the design of the flip cover is absolutely leak-proof, splash-proof and non-slip, the first choice for fitness outings.</p><p>100% Satisfaction Guarantee: If you have any problem with our Sports Fitness Shaker Water Bottle or questions, please kindly contact us for direction, exchange, refund or return.</p>