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When I had to do a science fair project for my son a few years ago, we made several pepsi can stoves and timed how long they took to boil water. I can't remember which worked best but they were all very slow compared to my white gas stove. Fill material and size and orientation of holes makes a bit of a difference. So make several of them to see what works for you.
I took an alcohol stove made of two cat food cans with big triangle holes in the sides camping once. But I forgot the wind screen, so it was pretty much a failure. The cat food can lit and burned hot instantly, so I thought it would give me less trouble on a cold morning than the pepsi can stove. But alcohol does not burn hot enough to go without a wind screen - a good wind screen is essential.
I camped with a couple of guys, one had a whisperlite, I had a peak 1 feather, and the other guy had a pepsi can stove. Wouldn't you know my stove gave me more trouble on that trip than any other time, and the whisperlite sputtered and flared as well. The guy with the pepsi can stove had a good time laughing at us as his stove performed beautifully.
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