You bring up an interesting point about coffee and alcohol's effects on hydration. It's a common belief that coffee is a diuretic, but the reality is more nuanced. While caffeine in coffee can have a mild diuretic effect, it's not as pronounced as many people assume. In fact, for regular coffee drinkers, the body often adapts to this effect, and the net impact on hydration might not be significant. But, as you point out, alcohol is diuretic. Great article!