1. Stove fuel: Maybe you have an alcohol-burning camp stove, or your made one like the beer can stove in our survival by beer gallery (link). For that type of stove, you’ll need some very high-proof liquor (like Everclear, if you can legally get it where you live) to efficiently cook your food and boil your water.
2. Wound management: It’s going to hurt, but alcohol could be used as an aggressive disinfectant on topical wounds. This is a pretty rough way to practice field medicine, but it is on the table as a last resort.
3. Pain management: From broken legs to broken hearts, lots of folks find solace in a sip or two of the good stuff. It’s not a perfect pain killer, but it may be all you have in a pinch. Just make sure your booze is the drinking kind. Denatured alcohol, rubbing alcohol, methanol, and many other alcohol products are toxic.
4. Bartering: Whether you drink alcohol or don’t, there will always be plenty of folks around who will want some. In the event of a prolonged disaster, alcohol (along with cigarettes and caffeine) could be a very valuable trade good.
5. Gear disinfectant: You could disinfect your gore-covered knife, the dirty drinking hose to your Camelback, or a host of other filthy things with some high-test booze. Think of it as hand sanitizer for everything else.
And if you’re not going to use it as a stove fuel, it helps start a fire. Although alcohol stoves are lightweight and really clean-burning, meaning that if you’re desperate, they can also be used to heat a tent, provided you don’t have candles (and cook in it in a pinch). You can spend money on alcohol stoves but they’re simple enough to make, obviously, out of you know, trash.
But they lose points for not listing the best reason: getting blotto in the woods. Duh.