Nuk hello kitty soothers silicone size 2 limited edition have a specially designed orthodontic profile that adapts to the shape of babys mouth this helps to exercise the lips tongue and facial muscles which promotes the healthy development of teeth and jaw the flat shape of our soothers helps prevent pressure marks and also stops the soother from falling out of babys mouth the nuk air system helps to ensure the mouthpiece remains soft and flexible and integrated grooves enable saliva to f