The Pigeon Peristaltic Silicone Nipple is designed to encourage natural sucking patterns in babies. This slim neck nipple features a medium (M) flow rate and is made from high-quality silicone material that mimics the feel and movement of natural breastfeeding. Key features: • Medium flow rate (4.5 months+) • Slim neck design • Peristaltic technology • Made of soft silicone material • Promotes natural sucking pattern The nipple is compatible with Pigeon slim neck bottles. The peristaltic design helps develop proper oral muscles while feeding. The silicone material is durable, easy to clean, and maintains its shape through repeated use and sterilization.