Simple solutions for your baby. Reduces colic with vented nipple design for less air. BPA free. First Essentials - making it simple for mom and baby. No. 1 selling reusable bottle feeding line in the USA. Gerber nipples are specially designed for your baby's feeding comfort at every stage of development. Made of soft, clear and durable silicone. Vent holes and ribs ensure smooth flow and help prevent nipple collapse. Fits most standard, reusable bottles. Made in Thailand to Gerber specifications.