Tequila

A spirit that is only produced in two region of Mexico and that is made from a minimum of 51% of distilled blue agave sap.

The following is an exerpt from one of The Raven's articles.

Tequila and the Worm. Many of those reading probably already know this, but tequila never has a worm in it. Well, except maybe a few novelty brands. The association of Mexican liquor and worms actually comes from the parent group of tequila, mescal. Properly defined, mescal is any liquor fermented from the agave plant. Tequila is any mescal distilled entirely from the blue agave and produced in the Tequila region of Mexico. Much like champagne, tequila is simply a regional instance of a larger type of booze. The worm comes from a mostly unrelated mescal, and was not put in the bottle so you could prove how tough you are. The worm was used to prove that the liquor in the bottle was the strength that the salesman was telling you. If the booze had been cut with water, the worm would still be alive. If you follow the logic, the booze in the bottle is strong enough to kill a worm. Makes you want to drink a whole bunch, doesn’t it?