I have plenty of these laying around. I was thinking about making a core that fits inside of it. It is much smaller than a rocket stove made out of a 55 gallon steel drum, but then of course, the principles are the same.
In the spirit of recycling, having fun and learning as you go, why not?
I doubt it will do much to heat up more than your bedroom, but if your expectations are fairly low, then give it a shot and let us know what you learned.
Just know that when a rocket stove is scaled down too far, the principles of how they function change and can become more finicky to operate.