You should want to drink from your toilet. Flushes flood sewers with precious liquid that ends up washed out to sea or sprinkled on crops. But we could be enjoying recycled urine as a beverage. Some U.S. cities, like the perpetually parched San Diego, are beginning to use advanced purification treatment plants to reclaim the stuff, combating drought by harnessing millions of gallons of would-be waste daily. It tastes so good, you’ll forget that it used to be your neighbor’s pee.