Natural Feeding Rhythm: The Natural Response Nipple releases milk only when the baby actively drinks, allowing babies to drink, swallow, and breathe using their natural rhythm, similar to breastfeeding. Ease of Combination Feeding: This teat design makes it easy to combine breast and bottle feeding, providing flexibility for parents and caregivers. Anti-Colic Valve: The teat includes an anti-colic valve that is designed to keep air away from the baby's tummy during feeding. This helps reduce the risk of colic and discomfort associated with air ingestion. Recommended Age: Suitable for babies aged 3 months and older, catering to their feeding needs and developmental stage. Overall, the Avent Natural Response Teats 3 month+ Flow 4 2 Pack aims to provide a comfortable and natural feeding experience for infants while also addressing concerns related to colic and air ingestion. (description exceeds maximum possible length)