Avent Anti-Colic fast flow teat 6 months + is designed for uninterrupted comfortable feeding. The ribbed texture & design prevents teat collapse and reduces feeding interruptions & discomfort. Finally, the teat allows air to be vented into the bottle and away from the baby’s tummy & the shape of the teat, allows your baby to securely latch. - Features of Avent anti-colic teat 6 months +Anti-colic valve to reduce** colic - Ribbed texture prevents collapse for uninterrupted feeding - Compatible range from breast feeding to cup - BPA free - Different teat flow rates available