Clinically proven to reduce colic and discomfort* Trusted for 30 years Easy latch on due to the unique valve on the teat Unique valve on the teat flexes to your baby's feeding rhythm. Milk will only flow at the pace chosen by your baby to minimise overeating and spit-up, burping and gas Clinically proven to significantly reduce fussing Sleep and nutrition are vital to your baby's health and happiness. A randomised clinical trial was carried out to see whether infant baby bottle design affects "infant behaviour". The Philips Avent Classic baby bottle was shown to significantly reduce fussing by approximately 28 minutes a day as compared to the comparator bottle (46 min vs 74 min, p=0.05) This was especially true during the night-time.** Unique anti-colic system As your baby feeds, the unique valve on the nipple flexes to allow air into the bottle instead of your baby's tummy. BPA free teat This teat is made from silicone - a BPA-free material (Following EU directive 2011/8/EU) Different flow rate teats available The Philips Avent Classic bottle offers different flow rates to keep up with your baby's growth. Remember that age indications are approximate as babies develop at different rates. All teats are available in twin packs. Compatible with Classic feeding bottle We advise to use the Classic teat with Classic baby bottles only. Easier to clean Our Classic+ teat has a new design and is now even easier to clean. 2 piecesVariable flow3m+