I'll add one more suggestion to all the great ones you've already got.
Let the story tell you what needs to be explained.
Write the passage only providing the information you would when using your chosen point of view (for instance if it's deep third person, the POV-character will likely know about the pot and its meaning, etc, so they won't spend a thought on this at all).
It's possible that the story will offer a way to explain the pot later. Or not.
Once you've finished the first draft, put it away for weeks, months, years... whatever time you need to forget the details.
For me, it's about 3 months. After that, I must read the story from the first page to the last or I'll start mixing things up (who said absentmindedness was bad?), and I'm quite able to detect things that don't work or won't make sense to someone that reads the text for the first time.
On this reread of the manuscript you might be able to test if your pot makes sense or not.
Maybe it needs to be explained more—then explain it more (using any of the other answers). Maybe there's an explanation but too late—then move it up in the text.
Write an exploratory first draft and finalize the novel in editing.
Even if you're like me and do a lot of outlining your first draft might contain a cohesive story, but will likely still need changes to small details or larger parts. The only first draft that needs no editing is either produced by a senseless fool or an insufferable genious. And a genius who doesn't take the chance to "do the test" one more time to improve their score is still a senseless fool...