Spell Slot Tracker - Mint Tin Insert

This insert is designed to fit inside a Big Sky Mints tin (https://bigskybrands.com/brand/big-sky-mints/) - roughly 90mm by 55mm interior measurement (~20mm height). It holds standard size d6s to use as spell slot counters; they should stay in place when the tin's lid is closed. You could superglue the insert to the inside bottom of the tin, but I don't find it to be necessary.