I know they are untradable, but can you giftwrap them, then trade them?
Giftwrapping used to trigger a glitch which made untradeable items tradable. This glitch has been patched, and those items are still tradable. Today, gift wrap is just used to give untradeable items like the UHHHH to other player in a trade. Because it is patched, they CANNOT be tradable forever. The item will become a carefully wrapped gift upon use. this tool is then allowed to be traded, and the item will be dropped when the gift is opened.
But more to the point, items from the cauldron can be gift wrapped. The cauldron itself however, cannot.