The worm is found in some brands of mezcal. Mezcal is a Mexican type of traditional hard liquor, but it's different from tequila. According to some people, tequila is essentially a type of mezcal, not the other way around. That doesn't change the fact, though, that no one ever puts a worm in the tequila. The worm is only found in some brands of mezcal from the Oaxaca area.