Many years ago, my dad designed and built several food storage shelves out of wood for small canned goods (soups, fruits, veggies, tuna, etc.). I just realized he has the plans online. If you're in the market for food storage shelves and want to try and make them yourself, they are very sturdy! In the picture, mine are stacked 3 1/2 high (I have a 1/2 shelf in there, too!).
