In Rayman Origins they appear in Gourmand Land. When they are hot, such as when a Baby Dragon Waiter breathes fire at one, or a pepperpaste expels fire towards one, they will boil; venting steam and raising the lid in a similar fashion to a geyser. The heroes are able to stand on the lid in order to reach higher places. In Rayman Legends, pots appear in the Back to Origins painting, where they no longer have handles.
A pepperpaste expelling fire towards a pot, causing it to boil.