Imagine you have a salve, perhaps a vapor rub or a hand cream. It comes in a small, circular (or to be more accurate, cylindrical) metal container.
Typically, I would say:
I have a "tin" of that vapor rub if you want some.
However, I'm writing a fantasy story where they would never dream of wasting metal on such a frivolous pursuit - rather, they use glass because sand is everywhere.
I've looked in a thesaurus but all I'm finding are things like container and dish. Dish might make sense but I don't think of dish as having a closing lid. It's too short to be a jar.