Pigeon Flexible Peristaltic Nipple 4+m Mediuml # 26659 remains one of the top choices of mothers who are breastfeeding and bottle feeding their baby at the same time. The nipple features a rounded tip with unique grooves on the inside to make babies think they are drinking directly from the breast. If your baby becomes cranky after feeding, this nipple is designed to reduce air pressure inside the bottle to provide mothers with an enjoyable feeding experience. It is also an ideal option for mothers with colicky babies.