I wanted to try my hand at modeling something SiFi / Military looking so I came up with this stashbox. I put my fine liner pens inside it but you can put whatever fits inside. The inner box has tabs that snap into indents in the outer box to help keep it closed.

Both parts of the box print standing up with no supports. I would recommend a brim if your plate adhesion isn't strong.

Overall it is an easy print and a fun modeling exercise.