Designed with equal parts style innovation and versatility the met rx blenderbottle sportmixer rises to the challenge of your active and busy lifestyle redefining what it means to be a water bottle 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 the sportloop is surprisingly handy youll wonder how