A storage bag includes a first sidewall having a top edge and a bottom edge, and a plurality of shift regions about which the bag is capable of shifting. At least one of the shift regions includes one of a score line, an indentation, and a crimp formed into the first sidewall, and extends a distance along the first sidewall starting from near the bottom edge of the first sidewall. A second sidewall is connected to the first sidewall so as to form an interior of the bag with an opening to the interior and having a top edge and a bottom edge. At least one of the shift regions of the first and second sidewalls extends across and intersects with another of the shift regions of the first and second sidewalls, to facilitate shifting of the bag. The bag shifts between a flat configuration, and a stand-up configuration.