NUK anti-colic valve teats reduce air swallowing. Designed by Dr. A. Müller (dentist) and Prof. W. Balters.
Every type of food is different, the different sizes of holes for light liquids, milk and thick foods are most closely matched to the feeding needs of your baby.NUK Latex Teats are marked as follows:Small hole for light liquidsMedium hole for milk Large hole for thick foods