I use this pot to keep butter on the counter; you put a little water in the bottom, so the enclosed space (and water) keeps the butter cool. (I have noticed that if one doesn't make bread for 2-3 weeks and thus doesn't use any butter in the pot, then the butter might develop blue or orange streaks and have to be jettisoned. How long does unrefrigerated butter last?)
The only downside to this pot is that the butter doesn't have that great taste of really cold butter.