This is a glow pen! I found a light up pen end and used it on one side and used the end of another pen plus it's ink to complete this project. It is a resin print with a hexagon pattern on the inside, a hexagon print on the outside for grip and inscribed PRUSA on the end as well. Only took about 10 tries to get a perfect fit and each print was about 10 hours! I used transparent green resin.
The author marked this model as their own original creation.