Anti - Colic. Anti - Reflux. Doctor Recommended Features: Patented bottom vent promotes air - free feeding. Angled for semi - upright feeding to minimize reflux. 9 oz (266 ml) with naturalatch comfort silicone nipples - most like mom. Naturalatch Comfort Nipple: Most like Mom. Easy Latch - Raised texture and natural wide shape help baby latch naturally. Promotes easy switching between breast and bottle. Soft, breast like silicone nipple. Available in a variety of flow rates to grow with your baby. Up to 67% of infants can experience the symptoms of reflux in their first 4 months after birth (US National Institute of Health, Pediatrics and Adolescent Medicine, June 1997). Doctors recommend upright feeding to minimize reflux. Easy to clean and assemble. Trusted by moms for over 50 years. Ventaire bottle reduces colic, gas, spit - up and minimizes reflux. (1) Patented bottom vent keeps air at the back of the bottle as baby feeds, so virtually no air mixes with the milk and gets into baby’s tummy. (2) Naturalatch comfort nipple is designed to prevent air bubbles from entering the liquid as baby drinks. (3) Ergonomic angle allows for feeding in a more upright position to minimize reflux. Ordinary Bottle: Air bubbles. VentAire : No air bubbles. Nipple fits both playtex baby nurser and ventaire bottle. Read and keep enclosed insert with warnings, cleaning instructions and tips. Happy healthy tummy guarantee! If not completely satisfied, then return for full refund of purchase price or replacement. www.playtexbaby.com. Connect with us on: Facebook. Instagram. www.playtexbaby.com. 1-800-222-0453 BPA free. Bottles and nipples made in China.