A unique weighted straw that allows for Doctor recommended upright feeding to help reduce reflux and GERD. "The unique ability to latch and feed in any position. The 360 degree weighted straw follows the milk allowing your little one to latch and feed in any position comfortable, including upright. A Removable Straw: When baby has outgrown reflux and colic symptoms, simply remove the straw and continue to use as a standard bottle. Simplicity and time saving: The alignment zone provides parent with visual key to properly align the top with the base to ensure perfect performance. Few pieces make preparation, feeding, and cleaning as easy and simple as possible. "