This has to be one of the oldest porch drinks. My grandmother once told me it was the soft drink of her generation (that, and Coca-Cola, which, with a trace of cocaine in its early days, put a pep in her step). Shrubs make great use of fresh fruits—blueberries, blackberries, raspberries, strawberries, you name it—and are kept in concentrate form, which, tightly covered, will keep in your refrigerator for a couple of weeks (just whisk it to incorporate the sugar foam that forms on top). Don't be alarmed by the vinegar; the sugar and water tone it down, leaving it most enjoyable. This could be made into a punch by pouring the shrub concentrate into a large bowl and adding 12 to 14 cups of water followed by ice cubes.