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 BlenderBottle® wire whisk—and the all-new Classic™ shaker will fast become your go-to favorite. Whether it's protein, pre-workout, or just plain water, you can rest assured that you've got a tight seal. Like all BlenderBottle® brand shaker cups, the BlenderBottle® Classic™ is made using high quality BPA - and Phthalate-free materials. FEATURES: 20-ounce capacity (Note: measurement markings only go to 14 ounces) Patented mixing system uses 316 surgical-grade stainless steel BlenderBall wire whisk found only in BlenderBottle brand shaker cups Wide mouth makes it easy to add mix scoops and liquids, and embossed markings measure both ounces and milliliters; rounded base for thorough mixing Screw-on lid creates leak-proof seal, and secure flip cap with SpoutGuard keeps germs at bay; wide loop top for easy carrying or attaching keys Dishwasher safe, BPA and phthalate-free