Abstract: A collapsible bag for use in containing and dispensing a liquid, such as in a bag-in-box arrangement, and a method for making the bag, wherein an elongated reinforcing strip is attached to the outside surface of the inner bag layer of one of the bag walls and extends from adjacent to the spout to remote therefrom, and a plurality of grooves are provided in the strip and also in the portion of the inner bag layer of the bag wall attached to the reinforcing strip, thus providing liquid passageways inside of the bag to achieve complete withdrawal of the liquid from the bag as the bag collapses, without the expense and complication of having to insert a separate dipstrip member into the bag and to connect it to the spout.