Description: A great choice to get you started, our two-pack of 9 oz. crystal clear nurser bottles are made from the revolutionary Tritan™ material that is BPA and toxin free. Developed under the direction of Dr. Andrew Weil, the bottles features the exclusive AirWave™ venting system that is clinically proven to reduce colic. It comes standard with a stage 1 nipple, ideal for newborns, and its one-piece vent is extremely easy to clean.