I use denatured alcohol it burns hot and clean. I have tryed 91% isopropyl alcohol it worked but smelled bad. I have frends that have used 151 proof rum. What a waste.
I am going look for a pic of a soda can wood stove i have made in the past. You just bring a soda with you and drink it before lunch and then make a stove out of it to cook your lunch.
Mike