This past week Moco Loco posted about this module plywood system (above) by Post Fossil. Acting as shelving, the simple plywood boxes are all held together by a system of standard foldback clips. No tools required. And coincidentally, I had a similar modular box type system bookmarked (see below)- only made with a much cheaper cardboard material through an etsy shop called Recyclebox for $36. All of a sudden DIY's just got a little bit more interesting with these two brilliant ideas.
