Legacy Series SportShaker 27oz Bottle Features oz/ml markers on the sides so that intakes are correct on every meal and includes a washable plastic mixer so you can shake it on the go. The shaker bottles also feature snap-tight lids with flip-top SportShaker uses patented ProBlend Technology harnessing the power of kinetic energy. Studies show that kinetic-based mixing elements that blend against the flow of material provide a more effective and smoother blend than shakers with free-moving mixing elements that only flow with the material.