Pigeon Slim Neck Decorated Feeding Bottle is fitted with a SofTouch Peristaltic PLUS Nipple which enables natural movement of the baby’s tongue while helping the baby’s facial and jaw muscles to strengthen and aid their development. It comes with the best baby bottle nipple that allows wider and smoother tongue movement. The nipple is made with 100% silicone which gives it flexibility and elasticity. The nipple can be adjusted according to the required flow of milk and has an Air Ventilation System (AVS™) to minimize the intake of air bubbles. Sterilisation method - boiling, steam, microwave.