I just got a 600 snowpeak pot Ive been playing with. I have found the best alcohol stove for it to be a tealight. I can bring 2 1/4 cups of 70F water to a full rolling boil in 9:15-9:45 in my kitchen, it runs out at 12:00 using 0.6 oz (20ml). Reliably, every time. Starting with 39F water, it just reached boil when the flame went out at 12:00 (give or take ~15 sec.) I live at sea level, and fuel is SLX denatured alcohol. I can just reach boil with 0.5 oz, but not a strong rolling boil, 30 sec more and it would be. Funny thing about the tealight, the heating performance depends on how much fuel is in it, it works better starting with more. Logic says that since .5oz is enough for ~10 min,and I boil at 9:30, I should reach boil easily with 0.5oz. It just doesnt work that way though, performance in the heating stage goes down with less fuel from the start.
Outside in my driveway, it takes about 10:15 to get strong rolling boil, and runs out at 11:30 using 20 ml. The additional flame movement from light winds makes a difference I guess. I can reach a boil, and keep the strong rolling boil for 5 min on 0.6 oz if I cut heat back to ~50% with a simmer device. Starting from 70F with the simmer device, It takes 19 min to reach boil, but still also maintains rolling boil for 5 min.
Some tealights are slightly taller than others. The walmart ones are pretty short, dont hold as much as some others. Also the height from the cup to the pot is critical for faster heatup. I use a small 1/8" balsa wood spacer beneath my tealight to insulate and adjust the height. 4-square high 1/2" wire cloth pot support.
Now the trick, which as far as I know I invented. To get any tealight to hold more, you just extend the cup vertically. How? high temp aluminum muffler repair tape from any auto parts store. Put a small strip around the inside of the cup with adhesive facing outward, just at the lip, not whole cup. then another small strip around outside to match. Squeeze together, trim, and voila..the tealight holds as much as you want it too. I like a small walmart one that is extended up by ~1/4".
The aluminum tape has many uses in stove building.!
Nothing else seems to work as good as the small teallight. Other containers transfer too much heat to the liquid if they have thicker walls, or larger diameter wastes fuel with flames up side of pot. The tealight is really perfect for my small pot. Fuel efficient , no priming, simple and elegant.
The best part about the tealight stove is it can be simmered from full boil without removing pot, windscreen, etc. easiest stove to simmer ever. cut out a few vertical supports in the wire cloth so a small plate with handle can be put over the tealight to reduce heat/vaporizatin thru the opening in your windscreen,. voila, instantcontrol. Not that a pot that small will be used for anything but boiling water though, i dont foresee actually simmering pasta, etc in a 600 ml pot.