Authentic BlenderBottle, for mixing protein shakes and smoothies, features an easy-open/easy-close push-button flip cap with a sliding lock to prevent accidental opening 710ml capacity sleek and durable shaker cup offers plenty of room for supplements, meal replacements, or water 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 Made of BPA- and phthalate-free, stain and odor-resistant durable Eastman Tritan plastic; dishwasher safe; manufacturer’s limited lifetime warranty