Yes, something else to put in your Altoids case.
Before you can enter the Cave of ... Tracts of Land, you need your trusty dice. And to keep them safe, use your 10 levels of Craft: Altoids to make this dice case!
Step 1: Cut some foam
Stiff packaging foam works the best for this. Scrounge some up from packaging for computer parts. (When in doubt, ask your IT department or the equivalent thereof.)
Cut it to this size:
2.25" deep (front to back)
3.5" long (side to side)
0.75" inner height (from inside bottom of tin to rim)
Cut a bit extra off the height to make it easier to remove the dice.