inkhorn
A small portable container, often made of horn, used to carry ink.
archaic
Goe good partner, goe get you to Francis Seacole, bid him bring his pen and inkehorne to the Gaole: we are now to examine thoſe men.
Where it comes from
From Middle English ynkhorn, inkehorn (“small portable vessel, originally made of horn, used to hold ink”), equivalent to ink + horn. Displaced Old English blæchorn, which had the same literal meaning but with the native term for "ink."
Adapted from the Wiktionary entry inkhorn (CC BY-SA 4.0).