The BlenderBottle Strada™ shaker cup is more than just a shaker. Packed with features that no one else has, it's the most innovative shaker on the market. Period. The BlenderBottle Strada™ Tritan shaker bottle features an innovative lockable flip cap. Worrying about your shaker cup opening inadvertently in your bag is a thing of the past. No more smelly shaker cups. We use premium, durable Eastman Tritan™ plastic to help keep your bottle fresh and odor free. Save your strength for the gym. The BlenderBottle Strada™ protein shaker opens effortlessly with just the push of a button. Snap shut the secure-lock for a quick, leak-proof seal.