Using bitters as the base of a cocktail is, to put it mildly, unusual. The Angostura Sour is indeed a good tonic for an upset stomach ... side by side (one with soda water and one without ...

Of all the body parts, the stomach is the only one that we refer to as getting “upset.” You’d never refer to a sprained ankle as “angry” or a broken toe as “disappointed,” and yet the stomach is ...