"Philips Avent Classic Plus 4hole X2- Anti-colic teat is designed for uninterrupted feeding. Air is vented into the bottle and away from the baby’s tummy. The ribbed texture prevents teat collapse and reduces feeding interruptions and discomfort.
Features:
• Anti-colic valve proven to reduce colic: Designed to keep air away from your baby's tummy to reduce colic and discomfort. As your baby feeds, the valve integrated into the teat flexes to allow air into the bottle to prevent vacuum build up and vents it towards the back of the bottle.
• 60% less fussing at night.
• The teat shape allows secure latch and the ribbed texture helps prevents teat collapse for uninterrupted, comfortable feeding.
• Different teat flow rates available: To keep up with your baby's growth. All teats are available in twin packs: Newborn, Slow, Medium, Fast and Variable Flow, and Thick feed.
• Made of BPA free material (silicone).
• Compatible range from breastfeeding to cup."