The First Choice range was developed with Mums and Medical Experts worldwide to find the ideal feeding bottle. The First Choice teat has the special orthodontic NUK shape and 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.