I've found pens to more commonly break before they run out of ink anyway. And my preferred roller ball pens (Uniball Air Micro) aren't refillable anyway.
But I've taken to using a Pilot Metropolitan fountain pen more often anyway, and that's easily and cheaply refillable from a bottle of ink.
Heh. I've found that my odds of breaking a pen are negatively correlated to the price of the pen. I switched to using pigma microns at the beginning of the year. Just starting on my 3rd pen. The first two are not only not broken, but they are also neatly arranged in my stationery drawyer. Marked as finished.
Wish they had a way of refilli g the inks on these pens. I wanted to try fountain pens but couldn't find archival quality ink (waterproof + smudge proof once dried) for them.
Noodler’s Bulletproof Black is pretty darn archival-quality. I bought a bottle when I was briefly fascinated with fountain pens (it’s cheap too!) and tested the strength claims by soaking the paper overnight. No ink loss, though the paper came apart when I tried to get it back out.
I'm switching frequently between Pigma Micron and Pilot Drawing Pen.
I like the ink of the Micron, overall the feel are similar enough that both are fine for me, but the Pilot simply lasts longer.
I've a set of both, and what I've found is that when unused for a while (despite being neatly capped) the Micron will simply dry out and stop working. I've almost never had this with the Pilot.
For oddball diameters and colors which I use rarely it's a nuisance.
As snazz says, Noodler's bulletproof is pretty good, smudging is still a possibility with it but depends more on the paper you use. Another good one is De Atramentis Document Ink (better than the Noodler imho)
But I've taken to using a Pilot Metropolitan fountain pen more often anyway, and that's easily and cheaply refillable from a bottle of ink.