Cava de Oro Extra Añejo Cristalino Tequila is produced at Tequilera Puerta de Hierro in the Los Valles region of Jalisco, Mexico. The blue weber agave is cooked in brick ovens and extracted with a roller mill. Fermentation occurs in stainless steel tanks, followed by double distillation in stainless steel pot stills. Aged in French oak barrels, the tequila undergoes filtration before bottling at 38% ABV.