Pigeon Softouch Peristaltic Plus Nipple is a research-based innovation designed to enable baby to replicate natural sucking pattern learned at the breast. It caters to the 3 key steps when a baby sucks latching on, peristaltic tongue movement and swallowing. By having a smooth transition between feeding from breast to bottle, mums need not worry for the issue of nipple confusion. Nipple is of perfect shape and size to fit into the sucking fossa of baby. Salient features of Pigeon Softouch Peristaltic Plus Nipple: Inner vertical lines makes it collapse-resistant. Textured surface allows baby to latch on easily. 100% silicone nipple,super soft and flexible, allows natural and smooth tongue movement. Air Ventilation System (AVS) reduces intake of gas, a potential cause of colic. Nipple is of perfect shape and size to fit into the sucking fossa of baby.