Ran across a brief article on this subject in Outside online titled, Should You Drink Beer in a Survival Emergency? (For perspective, I don't think a 15" pizza constitutes a survival emergency.) What "to" and "not to" drink when combating hydration issues has been a moving target over the years. I recall back in the late 70s a popular wilderness survival book (that I literally read to shreds) said you should never drink urine. Today's wisdom is just the opposite, since pee is about 90% water and sterile.... cheers! This article cites a study in the United Kingdom where 72 test subjects in a state of normal hydration were asked to consume one liter of either water, milk, coffee, 4-percent beer, tea, orange juice, Coca-Cola, Powerade, or an oral hydration solution over the span of 30 minutes and then measured discharge volume. "Conventional wisdom has it that drinks containing alcohol and caffeine are diuretics: by making you have to pee, you lose more water than you’re consuming." Before you peek at the article take the poll.