The NUK Winnie The Pooh Silicone Soother has a specially designed orthodontic shape, which adapts to the shape of the baby"s mouth and helps exercise the lips, tongue and facial muscles, promoting healthy development of both teeth and jaws. The flat shape of the Disney Soothers helps prevent pressure marks and avoids being displaced from baby"s mouth. All NUK soothers employ the NUK Air System which helps to ensure the mouthpiece remains soft and flexible and the integrated grooves enable saliva to flow away from baby"s mouth, avoiding skin irritations to the area.