Internet solves lot of availability problems. But with 0.15/0.20 eur deposit, reusing cans seems surprisingly economical. Standard 330ml can should give about 90mmx205mm sheet, or 0.01845m², or ...

Sheet metal is very easy to form, including the pressing in of intricate shapes with dies and a hydraulic press, but the dies themselves are slightly harder to come by. What if we could 3D print cu… ...