The Pigeon FlexibleTM PP Bottle is a 120ml is a great for bottle-fed babies slim neck bottle with FlexibleTM Peristaltic Teats is made from light weight plastic. Best suited for low to regular use. When baby is not breast-fed. Baby is very small and if baby sometimes fusses at the teat. Comes with a Flexible Small (S) hole Nipple which has a slim neck and is made with double thick silicone that is soft and makes latching easy. Along with a venting system that helps minimize swallowed air and colic in babies. This bottle is BPA free.