OPUS 88. Full ink. Zero mess.
OPUS 88 Eyedroppers
These are basically a fountain pen with a built-in fuel tank. Huge ink capacity, ink shut-off valve for travel, and a Jowo compatible nib unit for easy nib swaps.

Want a pen that writes forever?
This is what our customers say:
Massive ink capacity
Can take on plane
Smooth, slightly springy nib
Easy to upgrade the nib
Easy as pie to clean
From Jen: Fill the pen with the eyedropper supplied and stand with the nib down to help the ink flow towards the nib. If you change inks every second day, this one's not for you.
Pick your pen
There's two main sizes. Koloro and Mini Pocket are size #5 nibs, and Demo, Omar, Harmony, Holiday Jazz are size #6. Both pens are well balanced and contrary to what you would think, the bigger pens require little effort to hold.Â
OPUS 88 Faqs
My pen won't write? Undo the end cap a few turns to release the shut off.
Will my pen burb? Only at the extremes of very low ink and very hot hands!Â
Why are the threads so long? To stop a very messy accident.