BlenderBottle Classic Shaker Cup Highlights: The BlenderBottle® Classic™ shaker bottle gives our tried and true best-selling bottle an impressive overhaul. The latest Classic™ shaker boasts a rounded base for better mixing, our pro-level SpoutGuard™ to keep germs off the drinking surface, and an upgraded, modern design. Add all that to core benefits you know and love—like our patented mixing system, featuring the BlenderBall® wire whisk—and the Classic™ shaker will fast become your go-to favorite. * Holds 20oz, 28oz, or 45oz * Rounded base for better mixing * SpoutGuard™ keeps your drinking spout clean * Measurement markings * Dishwasher safe * BPA and phthalate-free * Patented mixing system