Everything else is just a shaker cup. The BlenderBottle Classic revolutionized the industry back in 2004 with its leak-proof seal, iconic design, and the BlenderBall wire whisk; , The Classic Loops 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, youre ready to roll; , 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; , Our mixing system uses the BlenderBall wire whiskfound only in BlenderBottle brand shaker cupsto mix even the thickest ingredients as you shake.