StoryDragon quoted Hammered by Kevin Hearne
I untied the drawstring to my belt pouch by touch and removed a waterproof package of oilskin, which contained (among other things) some note-sized sheets of paper and a fountain pen for Plan C.
— Hammered by Kevin Hearne (Page 31)
I like that it is a fountain pen. And that it is explicitly mentioned. Not simply a 'pen'.