I have about 30 metal 50 cal cans now, been buying them from LGS'S and Gun ranges. $10-$15 dollar each, out of 1-10 scale of how well they are, I say 8-9 shape(only 3 are about a 4 shape because they were very rusty/repainted, still works) Very happy with them, stack about 7 high. Keeps your ammo safe, from getting crushed. Store ammo/magazines/cleaning supplies/etc in them.
SHTF vs TEOTWAWKI you ask? SHTF, just some crap on the ceiling and walls, TEOTWAWKI end of the world as we know it. Orignally made by 9mm/®™©