Closer to Nature Anti-Colic bottles provide optimum venting during feeding via a unique tube and valve system. The venting system is designed to reduce feeding problems like excessive spit up, fussiness and gas The Skin Soft textured nipple feels natural for babies making the switch between breast and bottle easily Polish Base Surface - Never stick to the skin,protect the skin from becoming red No BPA, nitrosamines, PVC, phthalates, chemical softeners, or artificial coloring. Fits most standard reusable bottles Material:Safety Liquid Silicone Package Content:1 x Nipple Pacifier Feeder