The sierra Zip Stove has been around and surely has made a lot of coffee, but it is heavy - a total weight of one pound. I know that doesn't sound like much, but many alternatives are much lighter. Whether it is feasible to pick up your fuel in the woods or carry it depends upon the length of your trip and the type of cooking you do. That is probably why most folks wind up with a variety of stoves and are also proficient fire builders.

I have found an alcohol stove a good item, especially on SAR missions. When you want a fire, you want it quickly, and easily, with no messing and fussing around. The fuel is reasonably safe, and (depending upon the precise type you have) useful for other purposes. For winter SARs, I would go to a traditional Primus-type white gas stove. It was well worth the additional weight. On one occasion, we carried two, just to be sure. And yes, you can always light a traditional camp fire,either for warmth or as a signal beacon. I have done that a time or two.