Nuby 6-Pack Standard Neck Vari-Flo Non-Drip Silicone Nipples

The first and only Non-Drip nipple is uniquely designed to prevent drips and spills. With a pressure sensitive valve feature safely built right into the nipple, fluid only flows out of nipple with sucking actions of baby. This special valve closes when sucking action ceases, ensuring a leak resistant bottle. The Nuby nipple massages infant's gums, aiding the teething process. With your baby's comfort in mind, an anti-colic feature was designed into the nipple, helping to prevent ingestion of air by baby, which may cause colic. Plus, they're BPA Free.