20-ounce capacity (note: measurements only go to 17 ounces) shaker cup for mixing protein shakes, smoothies, and supplements

Patented mixing system uses 316 surgical-grade stainless steel BlenderBall wire whisk found only in BlenderBottle brand shaker bottles

Twist-on cap with center-mounted spout seals with a quarter-turn and is backed by a Leak-Proof Guarantee

Foldaway loop for portability without bulk, and a firm, feel-good textured grip; made of stain and odor resistant durable Eastman Tritan plastic

BPA and phthalate-free, dishwasher safe; manufacturer's limited lifetime warranty