Everything else is just a shaker cup the blenderbottle revolutionized the industry back in 2004 with its leak proof seal iconic design and the blenderball wire whisk now years later its still the best selling shaker on the market why because it works say goodbye to lumpy protein shakes and hello to smooth great tasting drinks our patented mixing system uses the blenderball wire whiskfound only in blenderbottle brand shaker cupsto mix even the thickest ingredients as you shake