I bought these storage boxes in the back of the car and put velcro straps on the bottom (on the hook side) to keep them in place. They are quite strong when it comes to folding boxes and have gussets on the bottom to prevent the boxes from collapsing. Built-in handles are good, so there's no chance of them breaking. They would also be fine for indoor storage, although they wouldn't be able to carry extra heavy stuff. For the price I think it's a good buy.
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