Kraut juice
Kraut juice is a beverage made of the liquid in which sauerkraut is cured. An apparently American innovation, it is widely available in those parts of the U.S. Northeast and Midwest where German immigrants settled, such as central and western Pennsylvania.
It is a controversial beverage, highly regarded in its home territory, but generally seen as an undrinkable substance by the uninitiated.
Kraut juice is to be drunk cold, in a glass, perhaps with a celery stick protruding. Its flavor is savory and mildly acidic with a hint of caraway. It is sometimes used to mix cocktails.