I really liked the dice that sablebadger made, so I made a hinged case for them.
The hinge and case work well, and the dice stay in place even if you shake the box around.
Holds a full set of dice, great for DnD.
I printed the pin on end with 9999 perimeters and a brim.
Depending on your printer, you may need to file the holes out some for the pin. It will be an interference fit in the pins in the bottom. I used a hammer to tap it through and it worked great. No glue required.
I made the cover separate from the lid to allow you to add more details. Once you have it all printed, just glue the cover to the lid.