Herodotus described the Scythians processing mare's milk in the 5th century BC, and sanatoriums in Bashkortostan still offer kumys cures as a health treatment.
Kumys is made by fermenting raw mare's milk with a live culture over one to several days, producing a tangy, faintly sour, lightly carbonated drink with a low alcohol content. In Bashkortostan, roadside stands and market vendors sell it chilled from bottles or barrels, especially in summer.