The first time I had agua fresca at a taqueria in Mexico City, I wondered why we complicate drinks so much. It is literally fruit, water, and lime. And it is better than any fancy cocktail I have ever had. This watermelon version is my summer essential. You blend watermelon with mint, lime juice, and a little cold water, strain it if you want it silky (I do not bother), and pour over ice. It is refreshing in a way that soda and juice can never be. I make a big pitcher and keep it in the fridge