Patented mixing system uses the BlenderBall wire whisk Features a "StayOpen" flip cap and the classic screw-on lid Easy to clean and dishwasher safe Embossed ounce and milliliter markings helps you keep track of your intake Holds 28 ounces not including the BlenderBall and powders/supplements Whether you're weight training for sports, competing for the gold at the Olympics, or simply aiming to lose weight and stay fit, Blender Bottle's premium and innovative products help you maintain proper nutrition and hydration every step of the way. With