This is an ingenious design. - Snow Peak Stacking Shelf Container

This thing is built very sturdily. I don’t know what the weight limit is, but I keep one in my car and have used it to hold many heavy loads; groceries, firewood, glass to recycle, gear, etc.

The reason I bought this, an$ the reason I think it’s worth the seemingly high price, is that it’s a very cool origami-esque object. You can’t tell from the picture posted here, but the two halves of this thing can fold out, and lock in that position. And it remains stackable. So you could have these stacked on top of each other but not have to unstick them to access your stuff. Those clever Japanese!