All oak barrels in the Boon brewery have their own history and are characterized by unique microflora of wild yeasts. The bottles of Oude Geuze “VAT” are a combination of one specific wooden barrel (mono) and a minimal percentage of young Lambic (blend), which starts the refermentation in the bottle. The use of Lambic from one specific oak barrel (such barrels are also called “casks”) creates geuzes with very idiosyncratic characteristics: wine-like, whiskey-like, bone-dry or very tender. The number on the bottle always refers to the barrel number.We also offer the complete BOON OUDE GEUZE VAT VERTICAL!