Born Free Wide Neck Bottle 5 oz. Twin Pack These wide-neck bottles are lightweight and convenient and fit comfortably in your hand or in baby's grip.Air vent helps eliminate colic systems by promoting an even flow of liquid. Each bottle comes with a stage 1 nipple and a cover. New BornFree Bottles are guaranteed to be Bisphenol-A (BPA) Free, and come complete with the new innovative air vent that helps eliminate colic symptoms and reduce risk of ear infection. Each BornFree Bottle comes with a slow flow wide neck silicone nipple and a bottle cover. The wide neck nipple mimics Mommy's breast and when combined with an innovative air vent, create a smooth sucking action.