The making of wine in Kvevri is the oldest known method of wine production. Approximately 5000 years ago, this method spread from the region around the Caucasus across the world. The oldest clay jugs, found in Georgia, are more than 7.000 years old and appear similar to the current Kvevri jugs. There are several archaeological finds within the Mediterranean area, which diversity in shape and size equates to their functional diversity in use of these clay jugs.