Baby Booster's official custom BlenderBottle: this holds 28oz, is BPA-free, comes with their patented mixing system BlenderBall wire whisk, features a Stay Open lid to help make travel even more convenient, and comes with a leak proof guarantee. Currently available in Kiwi Green.

Say 'goodbye' to lumpy protein shakes and 'hello' to smooth, great-tasting drinks. This cup uses a patented mixing system uses the BlenderBall® wire whisk—found only in BlenderBottle® brand shaker cups—to mix even the thickest ingredients as you shake.

Clip It, Loop It, Hang It! Integrated with the StayOpen™ flip cap, the adjustable carry loop lets you hold more when your hands are full and offers a convenient place to attach keys while at the gym. Leak Proof Guarantee The Classic’s screw-on lid and secure flip cap keep your gym bag and car seat dry. With a snug twist of the lid and the assuring “snap” of the flip cap, you’re ready to roll. Worry Free Made from only the highest-quality materials, BlenderBottle® brand shaker cups are—and always have been—BPA and Phthalate free.