[pmulcahy11b]

That sound kind of like a stronger version of a house I saw on the Science Channel yesterday -- the walls are made of wood forms with highly-compacted dirt in them, and dirt's so compacted it's waterproof. Great for climate control within.

While you're at it, if you have enough containers, live in them.

I would guess they're pretty strong -- they have to stand up to being shipped all over the world filled with god knows what at whatever weight. Some are probably stronger than others, though.