Wikipedia
Ayran
Ayran (, ) is a cold yogurt beverage mixed with salt. In addition to Turkey, where it is considered a national drink, ayran can be found in neighboring nations including former Turkish colonies, being part of the cuisine in Azerbaijan, Bulgaria, Iran, and Arab countries.
Its primary ingredients are water and yogurt, and ayran has been variously described as "diluted yogurt" and "a most refreshing drink made by mixing yogurt with iced water".
Ayran is served chilled and often as an accompaniment to grilled meat or rice especially during summer.
Similar beverages include the Iranian doogh, but yogurt drinks are popular beyond the Middle East region—ayran has been likened by some to the South Asian lassi.