Supports independent drinking: With Flow Control, the baby intuitively controls the flow of drinking. Natural and jaw-friendly silicone teat with flexible, soft zone is modelled on the mother breast when breastfeeding. The NUK Anti-Colic Air System provides a natural food flow. Suitable for all feed types, combinable with all NUK First Choice products. Leak-proof, 6-18 Months, BPA Free, 2-pack.