Copper intake needs to be balanced out by zinc intake since they are antagonists regarding resorption in the intestines (This article says 1 copper to 15 zinc:

Copper intake needs to be balanced out by zinc intake since they are antagonists regarding resorption in the intestines (This article says 1 copper to 15 zinc: http://www.livestrong.com/article/336425-side-effects-of-trace-mineral-supplements/ http://www.livestrong.com/article/336425-side-effects-of-tra...), so if you supplement a lot of zinc you might be fine using such a pot.