Aged tequila has a long and strange history. Of the major spirits, barrel aging has caught on most slowly with tequila. In North America, this is partly due to its reputation as a party drink-ideal for shots or mixers and little else, much like vodka. The brand name of this particular bottle-1800-comes from the very year tequila was first aged in oak barrels, well over 200 years ago. So the history is there, even if the appetite hasn’t been.