Take a walk on the wild side with NUK Animal Skins orthodontic bottles that merge advanced NUK bottle and nipple functionality with trendy designs for easy feeding for your baby.It is the only bottle with an orthodontic nipple that supports healthy oral development. And, the bottle nipple features the NUK Air System - a unique venting system - which helps reduce colic. The natural shaped nipple also mimic's Mom's to help make baby's transition from breast to bottle a seamless one. This unique nipple also has the drinking hole specially located on the top side - not the tip like round nipples -- which allows the milk to mix more effectively with saliva and promote easier digestion. The impactful Animal Skin design can be coordinated with matching NUK Orthodontic Pacifiers and NUK Learner Cups. And, they feature interchangeable parts with other NUK bottles so it's easy to mix and match.Made by the by the number one selling brand of orthodontic bottles and trusted for 50+ years to nurture babies best.