Full-featured custom-sized wooden boxes for the FIFO (first in, first out) storage of my preferred sizes of canned food on a 48"x18" wire rack.
The way I built them, you'll need about 40" of 6x1 (or 24" of 10x1), 90" of 2x6, wood glue, as well as a band saw and a table saw to cut the wood to size, and a pneumatic staple/brad gun for assembly.
Step 1: Design
Most of the canned food comes in two sizes of cans:
2.95" OD x 4.42" H
4.00" OD x 4.67" H
, so I made the boxes 6" wide, to hold two of the smaller cans side-by-side, and 4.25" wide, to hold a single row of the larger sized cans.
The height of the wider boxes is larger mostly for aesthetics, though when fully loaded, they do weigh more, so the increased moment of inertial (and thus strength) is a plus too.