Dear Flashcove,
If you do want to store your shells in those little boxes, make them
yourself! Its really cheap. Just get some 3x5 and 4x6 notecards. Then,
with a cutting razor, kind of perforate the card by not cutting completely
through 1/4 inch away from the edge. Fold the edges up and tape them
together, and you'll have a perfect and inexpensive box for your shells. You
can cut the notecards into different sizes for different sizes of shells.
Although it takes time to make the boxes, its probably a lot better than
having your shells break in your cabinet.
Hope it helps,
Patrick