The Classic Bottle features a streamlined design for those on the go. Our customizable nipples simulate the elasticity, texture, feel, shape, color, and milk flow rate of a real nipple. Flesh-like in both softness and texture with interior fibers that mimic milk ducts, the Emulait nipple is not stiff and rigid like other bottle nipples. The nipple stretches and elongates during bottle feeding, allowing your baby to use the natural suckling action they are born with. Please include your nipple color and nipple shape! You can look through the options on the Emulait page.