Spring-loaded pen cup

Spring-loaded pen cup - my first 3D printing project.
Like everyone else, as soon as I bought a 3D printer, I started exploring databases of projects created by others. I had enough fun just printing.
But when I quenched my first hunger for creativity, I began to long more and more for learning how to design on my own.
The first result of this learning is this pen cup.
I just had to start learning the design program somewhere ;)