The denatured is OK, but it doesn't burn as hot or as clean... longer to heat and sootier pot/cup. The nice thing about these things is that they'll burn just about anything, grain alcohol works great, and there's the side benefit that you can use part of your fuel to spike the "end of the day" punch <img src="/images/graemlins/shocked.gif" alt="" /> <img src="/images/graemlins/wink.gif" alt="" /> <img src="/images/graemlins/cool.gif" alt="" />

Troy