El Tesoro Tequila Añejo Mundial Collection Aged In Knob Creek El Tesoro Kentucky Straight Rye Barrels is a masterpiece within the El Tesoro lineup, offering a distinctive and rare expression that showcases the artistry of tequila aging. This unique añejo tequila is meticulously crafted by aging it for twelve months in genuine charred-oak Knob Creek Rye Whiskey barrels, which had previously cradled Knob Creek Rye Whiskey for an impressive seven years. The result is a tequila that stands as a testament to the harmonious marriage of the rich agave spirit with the nuanced flavors imparted by the seasoned rye whiskey barrels.