Product Description: The new and improved BlenderBottle® Classic™ shaker gives our tried and true best-selling bottle an impressive overhaul. The new 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 all-new Classic™ shaker will fast become your go-to favorite. About the Classic™ Shaker Cup 28oz: 3.8" x 3.8" x 8.9" Rounded base for better mixing SpoutGuard™ keeps your drinking spout clean Measurement markings Dishwasher safe BPA and phthalate-free Patented mixing system