BlenderBottle SportMixer Signature Sleek Shaker Bottle, Diamond Native Black, 28-Ounce Patented mixing system uses 316 surgical-grade stainless steel BlenderBall found only in BlenderBottle brand shaker cups 28-ounce capacity (to the brim of the cup); Note: measurements only go to 24 ounces Dishwasher safe, BPA- and phthalate-free; made of stain and odor resistant durable Eastman Triton plastic Convenient Sport Loop makes it easy to carry anywhere; perfect for protein shakes, smoothies, meal replacements, and more Backed by the BlenderBottle Leak-Proof Guarantee