PIGEON Nursing Bottle with SofTouch™ Peristaltic PLUS Nipple ensures your baby gets your precious breast milk even when you are apart. It has Air Ventilation System (AVS™) that helps to adjusts air pressure inside the bottle. It consists of specially designed projections at the base and the top of the teats, allowing milk to flow smoothly into the baby’s mouth. The adjustment of the air pressure inside the bottle minimises air intake when feeding. Hence, baby will not swallow excessive air bubbles with milk. "• SofTouch™ Peristaltic PLUS Nipple is 100% silicone, super soft and flexible to allow for natural and smooth tongue movement • Air Ventilation System (AVS™) reduces intake of gas, a potential cause of colic • Bottle shape is easy to hold • Specially designed roll-free bottle hoods • Bottle is made from Polypropylene (PP) material which is durable and lightweight • BPA Free Size: 160ml Material: Polypropylene (PP) Sterilization Method: Boiling, Steam, Chemical"