1 Bottle, 4oz/125ml, Newborn flow nipple, 0m+. The teat stays full of milk, even when the bottle is horizontal, so your baby can drink in a more natural, upright position. This can help reduce reflux, aid digestion, and make feeding time more comfortable for you and your little one. Our unique AirFreeâ„¢ vent draws air away from the teat, so your baby swallows less air as they drink. This can help reduce common feeding issues such as colic, reflux and gas. Clinical studies have shown that the Philips Avent bottle reduces colic and fussing*. How? A valve in the teat prevents vacuum build-up as your baby drinks, allowing uniterupted feeding. This can help reduce colic, gas, spit-up and burping. The AirFreeâ„¢ vent can be easily assembled with any Philips Avent Anti-colic and Classic+ bottle. Also cleaning is a breeze, thanks to the bottle’s wide-neck, and there only being a few parts to clean. To start, fill the bottle with milk, place the AirFreeâ„¢ vent over the rim, and screw on the teat. Tilt the bottle downwards once to fill the teat, and you’re ready to go. When feeding, make sure the AirFreeâ„¢ vent stays on top. The teat will stay full of milk, even when it’s horizontal, for easier upright feeding. You can use your Philips Avent Anti-colic bottle with or without the AirFreeâ„¢ vent. The AirFreeâ„¢ vent is compatible with our 4oz/125ml, 9oz/260ml and 11oz/330ml Philips Avent Anti-colic and Classic+ bottles. The shape of the teat allows for a secure latch-on, and the ribbed texture helps prevent teat collapse, for uninterrupted, comfortable feeding. As your baby grows, their drinking needs change. Choose a teat with a flow rate that’s right for their development. The Philips Avent Anti-colic and Classic+ bottles can be used with or without the AirFreeâ„¢ vent—but they should only be used with Philips Avent Anti-colic and Classic+ teats. We designed our Anti-colic bottle range so it’s easy to mix and match tops and bottoms. This way you can progress easily from bottle, to training cup, to sippy cup, with fewer parts.