READ INSTRUCTIONS TO AVOID EXCESSIVE FLOW AND LEAKS: Feed your baby in a vertical-upright position. DO NOT tip or hold horizontally. The baby should feed with suction and against gravity, like a straw cup. Excessive flow can only mean the caregiver is tipping Bare Air-free to feed, like ordinary bottles. Anti-Colic Feeding with suction and flow-control for consistent milk flow, as opposed to gravity forced-feeding prevents choking, overfeeding and spit-ups. Healthier for your baby than regular baby bottles because feeding in a vertical-upright position keeps the food in the belly and not flowing back into the esophagus. Clinically proven technology to help prevent colic, severe gas, spit-ups, reflux and GERD with a patented moving air-plug that delivers air-free milk while the baby is in a vertical-upright position and, with suction, that allows your baby to control the flow and pace of feeding. Bare Air-free has helped thousands of parents getting rid of their baby’s painful symptoms, moms love it, Pediatricians recommend it, it’s backed by science, and published in major news outlets.Bottle Nipple Type: Patented Flow-Control® Technology. Item Weight: 1.6 Pounds. Material Type Free: BPA Free, PVC Free, Lead Free, Phthalates Free, Nitrosamines Free. Color: Aqua/Turquoise. Brand: Bittylab. Best Sellers Rank: #58,122 in Baby. Customer Reviews: 3.3 3.3 out of 5 stars 113 ratings 3.3 out of 5 stars. : B01HOHK3V2. Item Weight: ?1.6 pounds. Bottle type: ?Anti-Colic Bottle. Bottle nipple type: ?Patented Flow-Control® Technology. Dishwasher safe: ?Yes. Batteries required: ?No. Style: ?Easy-latch® for bottle-fed babies. Number Of Items: ?4. Additional product features: ?True Air-free Feeding while in vertical-upright position. Clinically proven to minimize GER, GERD, spitups and nightime colic in babies. Material free: ?BPA Free, PVC Free, Lead Free, Phthalates Free, Nitrosamines Free. Material Type: ?Medical-grade, food contact silicone and polypropylene. FREE of bpa/pvc/lead/phthalates/nitrosamines. Is Discontinued By Manufacturer: ?No. Item model number: ?47G-08OS. Product Dimensions: ?12 x 3 x 9 inches.