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The Peterson tool container is ideal for storing dice.
(lemmy.blahaj.zone)
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.
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.