Don Julio 70 Añejo Claro Tequila- With Don Julio 70 Añejo Claro, Don Julio Master Distiller Enrique de Colsa is able to get the rich, complex flavors of a traditional añejo in a liquid that is filtered to become a clear spirit. It spends 18 months in reclaimed American oak before being filtered, giving the tequila its unique clarity. In order to return Tequila Don Julio to a clear silver color, the aged liquid is filtered using a special process where electronically magnetized particles are added to the aged liquid. The free radicals in the particles bond to the coloring. After a certain period of time passes, the particles containing the color molecules are filtered out, producing a clear Añejo tequila.