Lockable. Rounded base. Push-Button open. Strada(TM) is the ultimate shaker cup. The bottle's a spill-proof locking lid opens and closes with the touch of a button. A flexible, ergonomic carry loop provides a comfortable hold. The powerful mixing system utilizes the BlenderBall wire whisk to mix even the most stubborn protein powder, and a rounded base ensures a smooth blend. Made from durable, stain- and odor-resistant Eastman Tritan plastic, the BlenderBottle Strada(TM) is simplicity at its best. Features: Rounded base for better mixing Lockable flip cap keeps your drinks secure Measurement markings BPA and phthalate-free Powerful mixing system