I don't think I've flown with a homemade dropper-converted pen. However, I've flown with (and used on the plane) a fully-filled Moonman M2 (~$25 on Amazon), wh

I don't think I've flown with a homemade dropper-converted pen. However, I've flown with (and used on the plane) a fully-filled Moonman M2 (~$25 on Amazon), which is built as an eyedropper pen, and I enjoy writing with it.