Natural and jaw-friendly: the particularly soft silicone teat was inspired by a mother's breast during breastfeeding. No colic – the NUK Anti-Colic Air System ensures a natural flow. Clinically tested: for an ideal combination of breastfeeding and bottle feeding. For all feeding types, compatible with all NUK First Choice accessories. NUK First Choice+ Flow Control silicone teat, jaw-friendly, spill-proof, 6-18 months, BPA-free, 2 pieces. NUK First Choice+ Flow Control teat: helps in the transition so that the baby learns to feed independently. The special NUK First Choice+ Flow Control teat allows babies to control the flow themselves, as they prefer, when bottle-feeding, they can choose to feed faster or slower or according to the thickness of the food in the bottle. The teat is also spill-proof. The innovative Y-shaped opening of the teat only opens when the baby is sucking on it and widens according to the suction strength. Together with the NUK Anti-Colic Air System, it guarantees a controlled flow of liquid. The Original: The original NUK teat is modeled on the mother's nipple while breastfeeding, giving enough space for the tongue and jaw, and the sensation that babies love. Natural sensation: With its soft zone, the tip of the silicone teat adapts perfectly to the baby's palate – to provide a natural sensation while feeding from the bottle. No colic: The “NUK Anti-Colic Air System” guarantees a natural flow to help your baby feed without swallowing air. For a happier tummy. Clinically tested: Due to its particularly natural shape, the NUK teat is well accepted by babies. This means it is especially suitable for babies who are bottle-fed and breastfed.