Turn an old Altoid tin box to a portable Yatzee case with room for five dice, a small pen and a folded sheet of paper.
It is modeled to fit 16 mm dice and a 98 mm long Zebra Compact F301 pen (with a diameter of 10 mm).
It is a snug fit, so in order for it to fit despite the thickness of the folded lip on the edge of the tin box, I have made the insert into two parts. No glue is needed. It should snap in place.
There is a thin wall (between dice one and two in the image) that you can just break off in case these two dice are too tight.
The author marked this model as their own original creation.