Oude Geuze 3 Fonteinen is a completely natural gueuze consisting of an assembly of 1, 2 and 3 year old lambic matured in oak barrels. This Gueuze is a natural, unfiltered beer that spontaneously re-ferments in the bottle for at least 6 months after bottling. Oude Geuze 3 Fonteinen can be stored in a stable, cool cellar for up to 10 years after the bottling date. Old Geuze that is kept for a long time softens in terms of acidity but acquires more complex taste notes.