What is
Žinčica or Žinčice is a drink made of sheep milk whey similar to kefir. It is a by-product in the process of making bryndza cheese.
Soured milk is a food product, distinguished from spoiled milk, and is a general term for milk that has acquired a tart taste, either through the addition of an acid, such as lemon juice or vinegar, or through bacterial fermentation.