The first reversible bottle on the market that can be used with or without the air vent. \ although it is recommended that the air vent is always installed to enjoy all the health benefits of our bottles - it helps reduce feeding problems, aids in digestion & retains vitamins. \ the dr browns options bottle will work as a compatible bottle if the air vent is not installed. simply remove it! \ some mums and dads find this a convenient option as their baby's feeding develops over time or the baby no longer has symptoms of colic. \ the power of choice! \ the innovative bottle that effectively and efficiently meets all the needs of parents. \ dr browns options grows with your baby's needs and offers health benefits, whether your little one experiences feeding difficulties or not. \ \ ergonomically designed bottle with a wide neck that makes it easy to fill and hold. \ made of modern and safe plastic without bisphenol – a. \ has a natural flow system and a transparent silicone nipple, which due to its wider base is preferred by breastfeeding mothers. \ using it with the air passage system, you benefit from all the advantages for healthy feeding. \ without the air passage system you have the convenience of a compatible bottle with air passage through the nipple. \