Another advantage of the air vent system is it replaces the vacuum force in conventional bottles. (organic-baby-resource.com)
Conventional bottles encourage babies to take only the end of the teat to their mouths, which can be confusing when baby switch back to mum. (thehomeclone.com)
* At 2 weeks of age, babies fed with a Philips AVENT Anti-colic bottle showed a trend to less colic than babies fed with a conventional bottle and a trend toward less fussing at night than babies fed with a competitor's vented bottle. (rookiemoms.com)