About five years ago, one of my bosses decided that we needed some "fire kegs" for people to warm their hands around when it got chilly in the outdoor seating area.
I stated that I didn't think it was a great idea, what with the feral children problem we have at the pub, but orders is orders.
So I made one.
I cut the top out of a "dented keg", then tack-welded a second top ring onto it. The rings are considerably thicker than the body of the keg, so much better for mounting valves and such. I bought all the propane hardware--ring, bowl and valve. The tank and regulator I had on hand.
I added the glass "pebbles" and lit it up to show the boss. It was a breezy day, and the first gust over about ten MPH caused it to backfire through the air intake vents, shooting flames out from beneath the bowl. End of experiment.
But I had fun making it!