Marvel Pro Series Hulk by BlenderBottle

28-ounce capacity (note: measurements only go to 20 ounces) sleek and durable Pro28 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 cups. Screw-on lid creates leak-proof seal, and secure flip cap with SpoutGuard keeps the mouthpiece clean; wide loop top for easy carrying or attaching keys.