Žinčica

Žinčica , Žinčice (in Czech), Żętyca (in Polish), Жентиця (Žentyća) (in Ukrainian), or Zyntyca (in Goralic) is a drink made of sheep milk whey similar to kefir consumed mostly in Slovakia and Poland. It is a by-product in the process of making bryndza cheese. Žinčica is fermented by the following Lactic acid bacteria: Lactobacillus casei, Lactobacillus plantarum, Lactococcus lactis and Leuconostoc mesenteroides. Traditionally, this drink is served in a črpák, a wooden cup with a pastoral scene carved into the handle.

Source: Wikipedia