Abstract: Apparatus for pressing vertical arrangements of units that are stored in an elongate container with a front, plural sides, and a cavity includes a mechanism coupled to the front and extending toward the rear of such container and including opposing arms. Each arm is located adjacent a corresponding, opposing side of such container, with the mechanism being actuable to move the arms toward each other a preselected distance as a way of pressing a first arrangement of subunits. The apparatus preferably includes a submechanism actuable with the arms to move inwardly toward the cavity a preselected distance as a way of pressing arrangements of subunits, i.e. loaded subunits, that have already been pressed by the mechanism.