Several days ago, someone asked about plugging the holes in their lid. Some barrels depending on what they originally contained, have lids that have 2 bung holes (a large & a small), some have 1 large (offset, or dead center) or none at all. My lid had none of the bung holes, so I drilled the 8, 1/2 inch holes for exhaust. To plug them, I got wine corks. I cut one end down with an exacto knife(like an octagon) then rounded it off with a dremmel tool. Works like a champ. the soft cork makes a good seal and didn't burn up.