I made one of these, but apparently I didn't follow the directions quite closely enough; it works, but I'm not happy with it.
I have bought one of these:
SEALED New Camping Backpacking Stove Stainless Steel Potable Wood Burning BBQ | eBay
It is a very nicely made item, but haven't had a chance to try it out yet.
On my last tour, I took one of these:
Zen Alcohol Stoves - Cyclone Alcohol Stove
I made a few of them, using tinned steel cans from beans, varying the design a bit until I had one that worked well. In fact they all worked about equally well, so it really didn't matter which I took. On tour, I was extremely pleased with it. You want to figure out exactly how much alcohol it takes to make your cup of tea, noodles, or whatever, so when the fire goes out the noodles are ready to eat.