35mm film canister where for years the universal boxes for every small thing. If you shouldn't loose some screws, have some needles to store, .... Since everybody uses digital cams they get rarer and rarer. I printed with 0.2mm resulution. But as the ABS is much more stiff than the original material the dimensions require to be pretty precise. If the top doesn't close as you like, you can vary the allover size of the top. Aceton treatment give a shiny surface and reduce the wallthikness a bit that the can get a bit more flexible