The Pigeon FlexibleTM PP Bottle is a slim neck bottle with a FlexibleTM Peristaltic Teat, 240ml is a great for bottle-fed babies. Use 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 Medium (M) (3+ months) 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.