Patented mixing system uses 316 surgical-grade stainless steel BlenderBall wire whisk found only in BlenderBottle brand shaker bottles
Wide mouth makes it easy to add mix scoops and liquids, and embossed markings measure both ounces and milliliters
The screw-on cap forms a tight seal to prevent leaks, while the flip cap closes firmly to hold the contents inside; includes a convenient loop for easy transport or key attachment.
20-ounce capacity (note: measurements only go to 12 ounces) shaker cup for mixing protein shakes, smoothies, and supplements