Philips avent anti-colic baby bottle newborn nipple lets nursing newborns control the flow of milk like with breastfeeding, which can reduce spit-up and overeating. Philips avent’s anti-colic valve flexes to keep air in the bottle and out of your baby’s tummy, a feature that reduces fussing and colic. In a clinical trial, two-week-old infants fed with a philips avent anti-colic baby bottle bottle experienced less colic than babies fed with a conventional bottle, with the greatest difference seen at night. The newborn nipple has a single hole, so newborns can learn to eat with the slowest flow philips avent offers. The nipple is made of flavorless, odorless silicone that resists discoloring and stickiness. The nipple’s soft, rounded shape promotes feeding for babies who nurse from both the breast and a bottle. We recommend to use the anti-colic baby bottle nipples with the anti-colic baby bottle or classic+ bottles. Philips avent classic+ and anti-colic bottles and nipples are interchangeable. Features:nipple features 1 hole ideal for newborns and breastfed babies of all agesclinically proven to reduce colic philips avent classic+ and anti-colic bottles and nipples are compatible. Anti-colic bottles can be used with classic+ nipples and classic+ bottles can be used with anti-colic bottle nipples. Bpa-free dishwasher safe.