ArticleBuying, Using & Maintaining a BarrelBarrel maintenance for those new to oak barrels.Already a member? Log InWritten by Daniel PambianchiYou'll Also Like Article MEMBERS ONLY Cellaring Beer Barrel maintenance for those new to oak barrels. Already a member? Log In Article MEMBERS ONLY Over a Barrel La Folie, a limited-release beer similar to a Belgian lambic, is aged with wild yeast and bacteria in wooden barrels. Here's how to make this superlative sour beer at home, with inside tips, techniques and a recipe from the New Belgium brewmaster.