Features:- a)Encourages baby to use natural sucking pattern. b)Peristaltic Nipple is ultra soft and flexible c)Ultra-soft Silicone with its double thickness ensures ideal softness and elasticity so that your baby can latch on comfortably and easily. d)AVS Air Ventilation System: Pigeon Peristaltic nipple with its Air Ventilation System helps to adjusts air pressure inside the bottle. e)The adjustment of the air pressure inside the bottle minimizes air intake when feeding. Hence, baby will not swallow excessive air bubbles with milk.