Cviček is a dry and noticeably sour red wine that is synonymous with Dolenjska, which is divided from the region of Bizeljsko by the Sava river. Other than Chianti, it is the only officially recognised variety of wine that is made from a blend of both red and white grapes - with Modra Frankinja, Žametna Črnina and Kraljevina most commonly used sorts, as well as Laški Rizling somewhat less frequently (with roughly a 70-30 split between red and white).
Since 2001 Cviček has been legally protected both within Slovenia and the EU as a product of traditional denomination, meaning that only wine produced in the Dolenjska region in accordance with official specifications can be labelled as Cviček. This has led to a peculiar situation in Posavje, where essentially the same wine is produced in areas north of the Sava river, but is called by the lesser known name Bizeljčan or even simply red table wine. While Cviček is undeniably sour, it is also quite fresh, light and fruity, and since it is limited to a maximum of 10% alcohol content it can be drunk quite liberally throughout the day or night without completely impairing one's ability to function.
For those interested in learning more about the history and production of Cviček, there is something of a holy trinity of sites that are easily accessible to visitors: the Embassy of Cviček in Raka, which was recently built for the purpose of promoting the wine; Vinska Klet Krško, which is by far the largest producer; and the wine cellar at the Božidar Jakac Gallery in Kostajevica Monastery, which is widely considered the birthplace of Cviček.