A cardboard blank for constructing a first larger size food storage box and also constructing a smaller size food storage box is provided. The blank includes a first plurality of panels foldably connected to one another along a plurality of primary fold lines in order to foldably construct the larger box, and further includes a series of tearable line elements for defining removable portions of the blank and a second smaller blank. The second smaller blank includes a second plurality of panels foldably connected to one another along a plurality of secondary fold lines in order to foldably construct the smaller box.