Editing Fountain pen (section)

===Eyedropper filler===
The reservoirs of the earliest fountain pens were mostly filled by [[Pasteur pipette|eyedropper]] ("dropper" was the term used at the time). This could be messy, spurring development of so-called "self-filling" pens equipped with internal filling mechanisms.<ref name="dropper" /> Though self-fillers had largely displaced dropper-fillers by the 1920s, they never went out of production, and there has been a revival of interest in recent years. For some, the simplicity, reliability, and large ink capacity of the dropper-filler provide ample compensation for its inconveniences.<ref name="dropper" />

After the eyedropper-filler era came the first generation of mass-produced self-fillers, almost all using a rubber sac to hold the ink. The sac was compressed and then released by various mechanisms to fill the pen.<ref>{{cite web|last1=Binder|first1=Richard|title=Filling System Histories: Capillary Pens – the Perfect Filler?|url=http://www.richardspens.com/?page=ref/fillers/capillary.htm|website=Richard Binder's Pens|access-date=26 July 2016|archive-date=7 October 2016|archive-url=https://web.archive.org/web/20161007001448/http://www.richardspens.com/?page=ref/fillers/capillary.htm|url-status=live}}</ref>