Physiological Nipple Perfect 5. Thanks to the interchangeable physiological nipples, the flow of food can be adjusted in four stages to suit the child's age. Available in Soft Sense silicone. Promotes the natural, peristaltic sucking rhythm. Mimics the shape of the mother's breast while sucking: The elongated, wide shape encourages the natural, peristaltic sucking rhythm, ensures a perfect fit, good acceptance, and easy drinking. The special treatment makes the surface silky soft and resembles the skin of the mother's breast, providing an even more natural and comfortable drinking experience. The anti-colic valve is also compatible with the Well-Being bottle line and prevents the nipple from collapsing, allowing the baby to avoid swallowing air. This helps to prevent colic and spitting up. Your baby can enjoy their bottle in complete relaxation. Ideal for older children. Bottle nipple Perfect 5, silicone, fast flow, 2 pieces.