Foeder” (say it with us: “FOOD-er”) is the Dutch word for what is essentially a large, vertical oak vessel in which beer is fermented.
Traditionally, foeders were used to store wine. They’re now used all over the world to ferment both clean and funky beer. Because a foeder is a larger wooden vessel, it allows the beer to take its time to mature and completely develop. That larger capacity means greater consistency in the final product.