The wide plastic tube that Peterson ships many of its tools in (and that you can also purchase separately, albeit with a large minimum order quantity) is also ideal for storing the standard six-die set of dice used in many tabletop role playing games. I suspect the overlap between physical security nerds and TTRPG players is significant enough for this to be rather useful.
Addendum: These containers are very common for specialized drill bits and also CNC ends. If you wanted a place to scrounge for these, I might suggest a local machine shop. Unfortunately, I haven't seen many clear versions of these for machining tools.
I have seen clear versions shipped with various chemistry supplies though, but I am unsure how to find a "chemistry shop" as easily as a machine shop. Knocking on the door of your local meth house is probably not a good idea....
Not a member of this community but I clicked the picture because I used to manage a machine shop. We discarded a hundred of these a day. Usually in red, green, blue, and clear depending upon the tool manufacturer.