PLA or ABS, Aluminium foil and household silicon. Download your free .stl printable file, import it to your 3D printing software and print a copy of ivault.stl file. (iVault is designed to be a single printed box) Choose and print the desired configuration, for iPhone4.stl, iPhone5.stl or neutral.stl holsters. (Holsters allow you to attach the cellphone to the ivault, the neutral holster is a flat top for generic smartphone use). Using aluminium foil, stack walls and cover the bottoms of both iVault hatches. Using acetone as glue (on ABS printing) attach the holsters to the iVault on the designated positions. Using household silicon for windows, create an air tight edge over the aluminium foil walls on both hatches. Remove excess plastic on latch with a cutter and brake it free. Enjoy! For a glossy finish on your ABS printed iVault, you can vapor wash it in acetone bath prior to assembly.