Vari-Flo Valve allows baby to control liquid's flow rate Teething nubs on Non-Drip nipple massage and stimulate baby's gums Anti-Colic Air System helps prevent ingestion of air by baby 0 Months + / BPA Free It's a three pack! These BPA free bottles also feature the Nuby Non-Drip Nipple. It gives you the comfort of an anti-colic air system and teething nubs for the massage and stimulation of your child's gums. The bottle's tinted colors and Non-Drip Nipple make them a great choice for you and your baby! From the Manufacturer Nuby BPA free 3 pack 10 ounce bottles with non-drip nipples.