Three six packs is not really a whole lot of drinking for a month, and given lack of running water it could just as easily be a way to keep a beverage around that's probably cheaper than soft drinks. It's also the kind of thing that you can offer to a friend without saying "hang on let me go get the hose from my brother's house."

And I'm pretty sure the "Slim Jim" mentioned are room temperature shelf stable sausage sticks, individually packaged and probably handy for someone possibly with no refrigeration.