Philips Avent classic Variable Flow Teats have a variable flow for thicker liquids where by, you adjust the flow by simply turning the bottle. They contain unique valve which flexes to your baby?s feeding rhythm so milk will flow at the pace chosen by your baby for more comfort. These unique valves are anti-colic, flexing to keep air in the bottle and out of your baby?s tummy, a feature that reduces fussing and colic. These teats are also compatible with all Philips Avent classic bottles. Usage Simply turn the bottle to line up the I, II or III marking with your baby?s nose to choose between slow, medium and fast flow.
