The Philips Avent Natural Response Baby Bottle (330ml) is designed for babies 3 months and older, featuring a fast-flow teat number 4. This BPA-free bottle is engineered to mimic natural breastfeeding with its innovative nipple design and anti-colic system. Key features: • 330ml capacity suitable for 3+ months babies • Fast-flow teat (number 4) for efficient feeding • BPA-free materials • Natural Response nipple design • Anti-colic valve system • Wide neck for easy cleaning • Ergonomic bottle shape The bottle features a Natural Response nipple that only releases milk when baby actively drinks, supporting their natural feeding rhythm. The wide, breast-shaped nipple promotes natural latch-on, making it easier to combine breast and bottle feeding. The anti-colic valve is designed to reduce feeding discomfort by venting air away from baby's tummy. The bottle's ergonomic shape makes it comfortable to hold for both parents and babies.