Anti-leak, user-friendly, easy-to follow instructional video (https://amzn.to/2U8llLS). Removes the air out of the feeding. True Air-free Feeding. Vertical-upright feeding position. Flow-controlled feeding. ***ONLY feed in vertical-upright position. MUST SEE INSTRUCTIONS. (https://amzn.to/2U8llLS). 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. Assemble and feed per instructions ONLY. (https://amzn.to/2U8llLS). If you need help contact us, a feeding specialist is available.Capacity: 4 Ounces. Bottle Nipple Type: Perfe-latch® for breastfed. Easy-latch® for all. Item Weight: 4 Ounces. Material Type Free: PVC Free, Polycarbonate Free, Phthalates Free, BPA Free, Nitrosamines Free. Brand: Bittylab. Best Sellers Rank: #34,044 in Baby. Customer Reviews: 3.6 3.6 out of 5 stars 389 ratings 3.6 out of 5 stars. : B07D5KYZYG. Country/Region of origin: ?USA. Item Weight: ?4 ounces. Bottle type: ?For babies with reflux, gas, colic, sleep troubles. Bottle nipple type: ?Perfe-latch® for breastfed. Easy-latch® for all. Dishwasher safe: ?Yes. Batteries required: ?No. Style: ?The only True Air-free Feeding Device. Number Of Items: ?1. Additional product features: ?Easy-latch® nipples for all babies, Feeds with suction to allow auto-pace feeding, DO NOT TIP or HOLD HORIZONTALLY, just keep Bare® right side up, Perfe-latch® nipple is for exclusively breastfed babies only, Feeds in an upright position. Baby upright. Bare® Air-free right side up, True Air-free feeding. Patented syringe-like technology allows to expel air. Care instructions: ?If you gettings dripping or spills, watch the video or call us, we'll help you step-by-step, Do not use bottle sterilizers - 5-minute Boil-sterilize only, Follow assembly instructions. Material free: ?PVC Free, Polycarbonate Free, Phthalates Free, BPA Free, Nitrosamines Free. Material Type: ?Medical-grade, food contact silicone and polypropylene. FREE of bpa/pvc/lead/phthalates/nitrosamines. Is Discontinued By Manufacturer: ?No. Product Dimensions: ?5.8 x 5.9 x 2.8 inches.