My pencil holder was never big enough and it was hard for me to find what I was looking for. So, I designed this modular pencil holder that can grow as needed and helps you keep your pens organized. It is fully customizable in Thingiverse or OpenSCAD customizer. You can change the dimensions, shape and number of modules and export all at once or the desired item only.
I added some interesting accessories to this modular system: