Coin Holder for DnD (or other board games)

I bought some metal coins from Amazon to use in my tabletop roleplay campaign, however found them a bit awkward to work with behind the DM screen. So I made a little organizer that holds 5 stacks of 20 coins, which is basically all I need in any given day.

The coins are 30mm in diameter and 2mm thick, so any similar sized coins should work just as well. I added some magnet holes to keep the lid in place, although I overestimated the strength of 4 small magnets, because they're definitely not enough to keep 100 metal coins in place. That said, the magnets are 5mm in diameter and 1 mm thick.

I also added a small opening in front of each stack, so you can more easily scoop out the bottom coins when the stack is nearly empty. On the back of the model is a thin imprint that says "coins", which I painted silver with some hobby paint after printing.