EASILY ACCEPTED BY BABIES: MAM USA SkinSoft textured nipple is accepted by 94% of babies and makes the switch between breast and bottle easy. FLAT SHAPE & REALISTIC TEXTURE: The flat shape of the nipple fits perfectly in a baby's mouth and its SkinSoft texture feels just like mom's breast. FAST FLOW FOR BABIES 4+ MONTHS: Fast flow nipple releases breast milk or formula at a steady pace, satisfying the appetite of babies 4 months and older. FITS ALL MAM USA BOTTLES: Contains two MAM USA fast flow level 3 bottle nipples that fit all MAM USA bottles, as well as the MAM USA Trainer Bottle, to accommodate baby's drinking needs at any age. MAM USA bottle nipples do not fit other bottle brands (Dr. Browns, Avent, Medela, NUK, Tommee Tippee, etc.) PREMIUM EUROPEAN MATERIALS: Made in Europe from high quality, 100% baby safe BPA & BPS-free materials. MAM USA bottle nipples and all MAM USA products meet or exceed both U.S. & European safety standards.