BlenderBottle Insulated Sling, Red, 28-Ounce 28 ounce capacity to the rim of the cup with measurements on the back up to 20 ounces Durable insulated neoprene keeps your drinks and shakes cool Convenient locking clasp easily clips the sling to your backpack, gym bag, purse, etc Rubber grip bottom keeps your bottle from slipping Eliminates "bottle sweat" on warm days Available in a variety of patterns and colors, so you can take your BlenderBottle mixer anywhere in style