Avent 2 pack 260ml bottle with slow flow teat. Healthy, active feeding. The AVENT Airflex bottle uses the unique AVENT Airflex Teat, which promotes active and healthy eating and accompanies the rhythm of baby's natural sucking. Thanks to the Airflex teat, the baby finds it easier to switch between breast and bottle. Breast feeding and bottle feeding Easy to combine Thanks to its natural shape of the breast, is very easy to combine breast feeding and bottle. Airflex Valve. The bottle incorporates AVENT Airflex Airflex valve at its teat, running to the natural rhythm of baby's sucking. Clinically proven to reduce colic A clinical trial demonstrated that at 2 weeks of age, babies fed with the AVENT Bottle experienced less colic than babies fed with a conventional bottle.