I love this ancient Egyptian drink which is one of the most popular drinks in Egypt. A taxi driver in Cairo stopped with me in the back seat and offered to buy me a drink from a street vendor (we were sweltering), since then I make it at home and drink it instead of wine when I want to stay clearheaded. It's deep scarlet in color and tart like wine (and as sweet as you like it). Look for dried hibiscus in Middle Eastern stores (its actually the calyx of the flower, not the petals). I sometimes grate fresh ginger into it.