Designed to create the best experience for baby. The GentleBottle keeps feeding as natural as it should be while stimulating development through touch and sight. The GentleBottle is made of 100% non-toxic, medical grade silicone. The soft texture and shape allow baby and parents a safe and comfortable grip. The off-set nipple design mimics a natural breast that allows for easy latching, reduces bottle rejection, and promotes upright feeding. The integrated dual-venting system reduces colic. The attractive colors of the GentleBottle help to stimulate the baby's visual senses, allowing for a strong role of direct experience with colors in the early stages of visual development. * 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. * 100% Non-toxic medical grade silicone, BPA, PVC, Phthalate free and dishwasher safe. * Smooth texture makes it easy to hold and a wide neck for easy cleaning. * O-3 month bottle comes with a slow flow nipple. * 3 month+ bottle comes with a medium flow nipple. * 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. Medical grade silicone Freezer, microwave, and dishwasher safe.