Keep your baby's tummy happy with the philips avent scf680/17 bpa-free classic 4 ounce polypropylene bottle, 1-pk. Clinically proven to significantly reduce fussiness, the anti-colic system allows air into the baby bottle, but not into your baby's tummy. The avent classic newborn nipple is extra soft and has a slow flow, so it's perfect for wee ones during their first month or for breastfed babies at any age. Mix and match this 4-oz. Bottle, newborn nipple and bottle cap with other avent classic feeding products as your baby grows. Dishwasher and microwave safe.