The GentleBottle is made of 100% non-toxic, medical grade silicone.
4 sizes of replacement nipples are available: slow flow 0-3 month, medium flow 3-6 month, fast flow 6 month+, X cut for thicker liquids 6 month+ Award winning product 3 month+ bottle comes with a medium flow nipple. Nipple design mimics natural breasts; allows for easy latching and reduces bottle rejection Integrated dual-venting anti-colic system limits air ingestion Off-centered nipple allows continuous flow, upright feeding and minimizes leftover liquid. 3pk.