This is a Philips Avent Natural Response Nipple.

The nipple is designed to work with a baby's natural drinking rhythm, releasing milk only when the baby actively drinks, similar to breastfeeding.

It is made of soft, flexible, and odorless silicone.

The anti-colic valve is designed to keep air away from the baby's tummy to help reduce discomfort.

The wide, breast-shaped nipple promotes a natural latch.

This product is compatible with all Philips Avent Natural bottles.