A nice case idea for my Raspberry Pi using common hand tools and easy to find, cheap materials. The total cost of material was estimated to be about $10.  Only tools needed are a pair of tin snips capable of cutting 20 gauge metal sheeting, a pipe cutter or hacksaw and a drill and some 400 grit sand paper. Materials can be found at your local hardware store or hobby shop. Ace and Hobby Lobby both stock the copper sheet and brass tubing.The assembled case is surprisingly rigid and offers moderate protection for the Raspberry Pi.

Source: Easy $10 Copper Raspberry Pi Case – 5