Allows baby to use natural feeding motion learned at the breast SofTouchPeristaltic 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. PIGEON Nursing Bottle with SofTouch Peristaltic PLUS Nipple ensures your baby gets your precious breast milk even when you are apart.