I have not yet seen a fire hula hoop offered for sale. I have thought about making one, but haven't yet had the time. There are three styles that I have been thinking of. Each will start with an aluminium tube bent into a circle and either welded together or joined with a dowel and screws. From there:
1. Wrap the entire tube with wick or rope. This is simple, but I fear that the tube/wick will get too hot by the end of a single burn.
2. Make one or more tube core poi with tubing whose inner diameter is greater than the outer diameter of the hula hoop. These are places on the rod before it is joined together. Picture jitter rings but much larger.
3. Place one or more steel rings on the hoop before closing it. From these rings, clip wicks and chains. Who knows how long? Six inches? Three feet? Someday I'll find out...
-p.