The GentleBottle is made of soft medical grade silicone that is 100% toxin free. The soft texture and shape allows baby and parents a safe and comfortable grip. The off-set nipple design mimics a natural breast that allows for easy latching and reduces bottle rejection. The attractive colors of our Gentlebottle helps to stimulate baby?s visual senses, allowing for a strong role of direct experience with colors in the early stages of visual development. </br>Features: </br>Attractive colors stimulate baby?s visual senses. Off-centered nipple design mimics natural breasts. Integrated dual-venting anti-colic system. Smooth texture makes it easy to hold. Wide neck allows for easy cleaning. 100% Medical-grade silicone. BPA, PVC, Phthalate free.