Siempre Rebel Cask is the brand’s rebellious barrel project, built from wild-fermented Supremo Plata tequila filled into rare casks at still strength. Official and retailer notes describe varying barrel programs across releases, including Sauternes, Cognac, bourbon, and other unusual casks, with aging typically around 5–11 months and some lots specifically cited at eight months in Bordeaux Sauternes casks. The result is a scarce, distinctive reposado with oak, cooked agave, vanilla, cinnamon, and spice, ideal for advanced agave drinkers and whiskey crossover customers.