Ah, El Tesoro. Good stuff. Made by hand from 100% blue agave. My personal favorite, the Reposado, is aged for just under a year in oak barrels before being bottled. It is excellent on its own, garnished with a lime; it also combines quite nicely with Cointreau, lime juice, and ice to form, as Jimmy Buffet would say, "that frozen concoction that helps me hang on".
http://www.eltesorotequila.com/products/reposado/
In a more "related to the comic" note, Matt drew the older style bottle:
... and I have a feeling I won't be allowed to post news anymore.