As baby drinks, the valve flexes to allow air into the bottle to prevent a vacuum, whilst milk flows at a pace that baby controls.

It's the air babies swallow during feeding that can cause painful colic. Listen for the gentle whistling sound as your baby feeds. That's your guarantee air is going into the bottle and not into your baby's tummy.

The AVENT Feeding Bottle uses the unique AVENT Teat with its patented anti-vacuum skirt which prevents the swallowing of air and reduces the risk of colic. Suitable from Newborn

Contains:
2 x 125ml/4oz
2 x 260ml/9oz Avent Airflex Natural Feeding Bottles
Newborn Soother and a Bottle Brush
4 x Airflex Extra soft silicone teats Newborn Flow
2 x Airflex Extra soft silicone teats Slow Flow.