Anti-leak, user-friendly, easy-to follow instructional video (https://amzn.to/2U8llLS). Always holds Bare Air-free right side up (nipple on top, base at the bottom. Like an open cup). ***ONLY feed in a vertical-upright position. MUST SEE INSTRUCTIONS. Clinically proven: 75% of infants no longer had GER after using Bare Air-free for two weeks. For Infants with Severe Gas, GER and GERD Symptoms, Midnight Colic, Daytime Fuss, Sleep Troubles.Capacity: 4 Ounces. Bottle Nipple Type: Patented Flow-control® nipples. Item Weight: 4 Ounces. Material Type Free: Polycarbonate Free, BPA Free, Phthalate Free, Polyvinyl Chloride Free, Nitrosamine Free. Brand: Bittylab. Best Sellers Rank: #101,575 in Baby. : B0B7TRT1VZ. Item Weight: ?4 ounces. Bottle type: ?Not a bottle. Patented syringe-like design. Bottle nipple type: ?Patented Flow-control® nipples. Dishwasher safe: ?Yes. Number Of Items: ?2. Additional product features: ?Suction-based feeding, Breast-like feeding, No vents, No bags, Patented syringe-like technology. Care instructions: ?Do not use bottle sterilizers - 5-minute Boil-sterilize only, Follow assembly instructions. Material free: ?Polycarbonate Free, BPA Free, Phthalate Free, Polyvinyl Chloride Free, Nitrosamine Free. Material Type: ?Bare® is made of medical-grade, food contact silicone and polypropylene, free of bpa, pvc, lead, phthalates, and nitrosamines. Package Dimensions: ?5.9 x 5.8 x 2.8 inches.