Authentic Bavarian Kellerbier.
A classic representative of a unique German beer style, Kellerbiers are unfiltered and unpasteurized lagers that date back to at least the Middle Ages. The beer is matured, unbunged (beer is exposed), in deep vaults. The final product is a smooth, naturally cloudy beer that's rich in vitamins (from the yeast).
Zwickl also stands out for its unique swing top bottle.