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