Ditto Phat and Trailrunner exactly.

And, to possibly add value to the thread beyond "me too" , note that there are alcohol stove options you can purchase that will simmer. Or at least my Brasslite will simmer, it has a little outer metal sleeve that rotates to control airflow with no "fiddle factor". I've only used it this way once or twice, but indeed it put out lower btu's for a longer time. $20 or $30 depending on model.