Want to convert your Esbit stove to alcohol?
How about this: Yet another use for an Altoids tin!

I made something like this years ago with the bottom of a round can, cut off to just fit inside the folded up Esbit stove. The can is filled with steel wool (you can use fiberglass insulation also). In the link above, they use perlite, which is supposed to be better, but the steel wool does not fall out. so I like it better. I use this stove, and prefer it to Esbit tablets, if I am out in the woods and want a nice hot cuppa.