Chicco Perfect5 Blue Silicone Slow Feeding Bottle 150 mL has a retro ventilated system and Physio teat prevents air intake, thus reducing irritability, regurgitation and cramps. It follows the natural and individual suction rhythm to allow a constant and regular feeding, without interruptions or fatigue. The teat adapts perfectly to the baby's mouth and respects its natural way of sucking. The soft and elastic teat, with Soft Sense finish , gives the baby a pleasant and natural feeling.The unscrewable base makes cleaning all parts of the bottle quick and easy.