Lou Pepe Geuze is part of Cantillon's Lou Pepe series which is bottled on a semi-regular basis. The series also contains Lou Pepe Framboise and Lou Pepe Kriek. Lou Pepe Gueuze is not a gueuze in the traditional sense. It is made from 2-year-old lambic that has been aged in used wine barrels. To carbonate the beer, a small amount of sweet liquor is added at bottling, causing the refermentation in the bottle. According to Cantillon's official website, "the particular name of these beers comes from the south-west of France, a region the Cantillon family is very fond of. In this beautiful region, the grandfather is called Lou Pepe."