For even more feeding comfort, Philips AVENT Anti-Colic Bottles are equipped with the Air Free valve specially designed to reduce air ingestion during feeding, limiting colic, gas & reflux. SPECIAL DETAILSClinically approved*, the Philips AVENT bottles reduce the risk of infant colic & decrease baby's fussing especially at night Anti-colic bottle equipped with an Air Free (TM) valve keep the teat full of milk & not air, even when the bottle is horizontal. This enables the baby to be fed in a sitting position Large neck & rounded corners for easy cleaning Teat designed to encourage good sucking, with a ribbed texture that prevents teat collapse, enabling a comfortable & uninterrupted feed Come with a supple silicon, slow flow teats, 1M+MORE INFORMATION: Guaranteed bisphenol A free polypropylene Highly resistant to shock & heat Microwave safe (for sterilising) & dishwasher safe for an easy clean Pack of 2, capacity: 240 ml Use Anti-colic bottle with or without the Air Free (TM) valve Complementary teats (available in 4 flow speeds) sold separately on this site 2-year guarantee Always check the temperature of the feed before giving your baby the bottle * It was found that at 2 weeks of age, babies fed with a Philips AVENT baby bottle had less colic & less fussing than those fed a conventional baby bottle