* 12-Gauge BlenderBall * Rounded Base * Leak Proof * Germ Guard * Adjustable Loop * BPA Free * Dishwasher Safe * Large Capacity This is not your conventional shaker cup. Boasting the Powerful new 12-gauge BlenderBall, a rounded base, and a 45-ounce capacity, the BlenderBottle Pro45 is built to go big. New 12-Gauge BlenderBall 58% Heavier for Mixing even the Thickest Shakes Expansion Pak Compatible Slide the Expansion Pak into Your Pro45 to carry supplements, snacks and more on-the-go.