Dr. Brown\’s Options+ Anti-Colic BottleAnti-Colic Plastic Baby Bottle, 3 months+ Ergonomically designed baby bottle with a wide neck that facilitates its filling and holding. CHARACTERISTICS Made of modern and safe plastic without Bisphenol – A. It has a natural flow system and a nipple made of transparent silicone, which due to its wider base is preferred by breastfeeding mothers. By using it with the air passage system, you benefit from all the benefits for healthy feeding. Without the air passage system you have the convenience of a compatible bottle with air passage through the nipple.