Designed to make the switch between breast and bottle feeding easier orthodontic anti colic silicone teat wide neck bottles for easy filling cleaning and stability all parts interchangeable with nuk first choice bottles approved by the british dental health foundation clinically tested and proven for combined feeding nuks anti colic air system reduces the risk of infant colic modelled on the shape of a mothers nipple during breastfeeding nuk teats encourage latch on approved by the british