Raspberry shrubs often pop up in 19th and early 20th century American housekeeping manuals, and those early recipes inspired this version. You can easily substitute another berry, or use a different kind of vinegar. For raspberries, I prefer a mix of red wine vinegar and Champagne vinegar, but all-red or all-Champagne works, too.
Recipes reprinted from Wild Drinks & Cocktails by Emily Han, with permission from Fair Winds Press, copyright 2015.