A simple and minimal personalized IDeMa 3D pen; you just need to add the pen ink.

3D printing settings:

It is better to print this pen with the flat side containing the IDeMa 3D logo facing down. 

You can print the file with a 0.1mm to 0.2mm layer height, 2-3 perimeters, and a 30%-50% infill; you don't need to enable the supports.