With the Olympics in Rio just around the corner, a lot of our drinking attention will be focused on Caipirinha (pronounced kie-purr-REEN-yah), the national drink of Brazil.

An inevitable by-product of Holiday excesses is a … choose your own label: hangover, sour stomach, upset tummy … you know. And there are many patent medicine vendors who will swear their products will relieve your problem.

But one of the oldest, simplest, most effective, and most refreshing remedies is Bitters in Soda (carbonated water).