Expertly blended by the Maestros de Ron Bacardí, BACARDÍ Gran Reserva Diez is aged for a minimum of 10 years in American White Oak barrels using the undisturbed aging process, in which rum bases are barrel-aged without being disturbed - no tapping, refilling or blending in the barrel. It is then filtered for a smooth finish. BACARDÍ Gran Reserva Diez dark gold rum is worth the wait.