Avent Feeding Bottle for 3 Month and above, recommend to use the Classic+ bottle with Classic+ teats onlyUnlike other bottlesn• The nipple reduces the occurrence of gagging and spit ups from your child. n• Soft silicone is used in the making of the teat while the bottle is made using polypropylene. Since these materials are free of BPA, they prevent toxins from leaching into the milk or the formula.n• A unique valve on the teat with anti-colic system flexes itself to match your baby’s feeding rhythm. n• The nipple also allows air into the bottle instead of your sweetheart stomach bottle, reduce baby fussing significantly. n• The feeding bottle is ideal for 3 month and above.n• You can easily clean the nipple and the bottle once you are done using them.