Casa Herradura, which invented the reposado category nearly four decades ago, recently reinvented the popular spirit with Herradura Colección de la Casa Reserva 2012, the first bottling in a series of planned annual releases of small-batch tequila. The indigenous wild yeast strain that the distillery uses imparts a distinctive flavor to all of its tequilas, but the company further distinguishes the Reserva 2012—which is aged for 11 months in medium-char American oak barrels—by finishing it for two months in po…