This 2-part tissue box cover is also a 20-sided die; stick your tissues through your favorite number and roll away! The top half also works well as a neat dice tray.

The model is split into two halves, connected by a thread to act as a weakpoint  that saves your dice from completely getting destroyed upon a forceful roll, as well as for less wasteful tuning.

You can either print the top and bottom, or use the pre-cut quarters provided in the download. These slices are designed to not print any loose geometries, and still fit within an i3 sized bed. I would recommend printing the parts oriented so that one face is stuck to the bed. The thread should have some tolerance, though you may need to tune the tolerance (this is my first time designing threads for 3d printing).

(designed for a square/cube tissue box)