I've seen plenty of dice bags, but had not seen any chainmail dice, so I thought I would take on the challenge.
Traditional 6-sided die made of bright aluminum rings and glass marbles.
5/16" 18g and 5/32" 18g rings for a total of around 2500 rings, plus 125 glass marbles. It's about 4" x 4" x 4" in size.
It's even usable! Just be sure to roll on carpet!