The First Choice range was developed with Mums & Medical Experts worldwide to find the ideal feeding bottle. First Choice bottles have an extra wide neck to make it even easier to make the feed & clean. The sealing disc & screw ring guarantee leak-proof transport. The First Choice teat has the special orthodontic NUK shape & an extra wide lip support to simulate breast feeding as closely as possible. The NUK Air System within the teat allows air to flow into the bottle though a vent. As the baby sucks, this ensures that no air is swallowed during feeding, thus helping to prevent colic. The NUK orthodontic shape & Air System have both been approved by the British Dental Health Foundation.