For any of you looking for a cheap heat source while ice fishing, a friend turned me on to this years ago.
Start with a 1# metal coffee can and place a roll of toilet paper inside. The toilet paper should be close to the right size to completely fill the can. Then pour isopropyl alcohol into the can and let the TP absorb it. Stop filling when the TP is no longer absorbing the alcohol and the liquid level is about 1/8" below the top of the paper.
Then, simply light the end of the toilet paper like a wick. You will have a clean burning heat source that you can also cook over (with a grill of some sort). Add alcohol to the stove when the toilet paper starts burning. BTW - keep the plastic lid for transport. Snuff it out and let it cool before putting the plastic lid on though .