Eppendorf's micropipettes are commonly found in the lab and research field. Their promotional micropipette pens, which are miniaturised versions of their micropipette, are popular among those who work in these industries. Being something so highly sought after, and the fact that they don't sell this anywhere, my girlfriend was upset that she couldn't get her hands on one. So having a 3D printer, I decided to take things into my own hands and model a micropipette myself.

The design is split into 3 parts - the nib, clicker, and body. Insert a spring into the body before assembling the clicker to get a fidgety toy you can now play with. As for the screw threads, it might not work depending on the resolution of your printer, but heating it up with a hair dryer before screwing the nib and body together helped with this issue for me.