Appenzeller Bier Vintage Sour Beer is a naturally fermented beer specialty brewed according to a traditional recipe with yeast and lactic acid fermentation. This special brewing method gives the beer a mild, pleasantly sour freshness, harmoniously rounded off by the addition of fresh raspberry juice. The result is a light, sparkling beer with a fruity note and natural character – ideal for those seeking a refreshing and at the same time extraordinary taste experience.