>>60774033
Dubs checked...
Some things I've found:
- Bottom has to be built so that it can hold the weight of what's inside.
- It would be nice to have recessed handles on the sides. Alas, that means probably thicker side walls, but maybe that also helps with supporting the bottom - a groove for the bottom plate?
- The latch should be sturdy.
- I've seen boxes with a sort of tongue around the opening's edge so when you close the box, the lid and bottom keep alignment. This tongue should be on the bottom, not lid. The contents will pack up along the inside and a lip from the top will get stopped by the contents.
- The lid does not need to be thick/roomy. If the contents stack higher than the bottom's edge, stuff may fall out when open. A tall lid is wasted space.
- It would be nice to have it lined with a cloth, preferably anti-tarnish cloth (can be bought by the yard from Amazon). I've thought of gluing cloth to cardboard plates that fit the walls and floor. Can remove and replace with new plates if/when the stuff is no longer effective.
- Should be fairly air tight when closed.
- Inexpensive. (as long as it's a wish list, y'know?)
- Dimensions should be some multiple of common silver dimensions - 41mm x however many coins wide and long, or 45mm if in capsules, or for 10-ozt bars, etc.
- Approximate rule: end weight will be about 3/4 of the metal's density time the volume (this allows for gaps between coins, but bars will stack denser if dimensions match multiples of bars'). I'd recommend shooting for 30 pounds. A spreadsheet will help for interpolating dimensions.

Howzzat for a start? :)