Our various size nipples adapt to your baby’s changing feeding needs from slow to medium and fast. We also offer a specific thick feed nipple when adding rice powder or cereal. Our design includes an elongated nipple to mimic a mother’s breast and minimize nipple confusion, this requires the baby to use the tongue rather than suck just as when feeding from the breast. The nipple is positioned off-center to promote upright feeding and reduces back flow. The anti-colic vent prevents air bubbles leading to comfort for baby and preserving precious nutrients in the breast milk. *Hegen Nipples are marked with "0/1/2/3/Y" embossing to indicate extra slow flow/ slow flow/ medium flow/ fast flow/ thick feed respectively.