Drie Fonteinen Oude Kriek By Eric Sturniolo Ah, spontaneous fermentation. The trademark of Brussels-area breweries like Cantillon and Drie Fonteinen. Drie Fonteinen produces their own wort (about 70% of their total production) and buys the rest from different breweries in Belgium. After the wort is cooled in a…coolship, it’s left exposed to the air, allowing…