Designed with equal parts style, innovation, and versatility, the BlenderBottle SportMixer rises to the challenge of your active and busy lifestyle, redefining what it means to be a shaker bottle. Say 'goodbye' to lumpy protein shakes and 'hello' to smooth, great-tasting drinks. Our patented mixing system uses the BlenderBall wire whisk—found only in BlenderBottle brand shaker cups -- to mix even the thickest ingredients as you shake. Made of durable Eastman Tritan plastic, the SportMixer offers superior clarity and durability and lets you enjoy today's smoothie without tasting last week's protein shake. The SportLoop is surprisingly handy -- just clip your SportMixer to your gym bag or backpack and take it everywhere you go. Tighten the bottle’s screw-on lid, snap the flip cap shut, and you’re ready to roll -- our leak proof guarantee has you covered. The rubberized SportGrip offers a firm hold, whether you're shaking up some protein or carrying water while you jog. Made from only the highest-quality materials, BlenderBottle brand shaker cups are -- and always have been -- BPA and phthalate free.