It's a three pack! Made from durable, break-resistant plastic which is BPA free. Graduated in both ounces and milliliters. The Non-Drip nipple is designed to prevent drips and spills. With a pressure-sensitive valve feature built right into the nipple, fluid only flows out of nipple with sucking actions of baby. This special valve closes when suction ceases, ensuring a leak-resistant bottle. With your baby's comfort in mind, an anti-colic feature was designed into the nipple, helping assist in the emergence of teeth by gently massaging infant's gums. The bottle's tinted colors and Non-Drip™ Nipple make them a great choice for you and your baby!