Tired. True. Totally Improved! The new and improve 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 of the drinking surface, and upgraded, modern design. Add all that to patented mixing system featuring the BlenderBall wire whisk – and the new classic shaker will fast become your go-to favorite SpoutGuard Rounded Base Measuring Marking BlenderBall Whisk