Authentic BlenderBottle with officially-licensed DC Comics Batman, Superman, Wonder Woman, Flash, Green Lantern, Batgirl, and Supergirl hero logos | Classic mixing cup capacity is 28 ounces (exterior measurements up to 20 ounces) | Patented mixing system uses 316 surgical-grade stainless steel BlenderBall found only in BlenderBottle brand shaker cups | Perfect for protein shakes, smoothies, pancake batter, and more; use as a mixer, leak-proof bottle, or drinking cup | Dishwasher safe, BPA- and phthalate-free, carry loop top, ergonomic flip cap, secure screw-on lid