This is a super simple container for your minivan. There just wasn't enough room in ours so we made an extra one. It works wonders for garbage, holding dvd;s, and anything else you may need. The sides are not solid but contoured for fast printing and not wasting materials.
I would go 4 shells on this to keep it tough but fairly hallow on the infill. It requires a bed size of 230mm, x 230mm . Any smaller you could just resize where needed.