Turning now to the drawings in greater detail, FIG. 2 shows a tab lock case in its erected configuration suitable for handling in an apparatus of the type illustrated in FIG. 1 but for the fact that the upwardly open case of FIG. 2 would be provided with product, such as beverage bottles or the like, in a packer (not shown) from which packer the filled cases would be fed on rollers, or on an under