Tequila is a regional specific name for a distilled beverage made from the blue agave plant, primarily in the area surrounding the city of Tequila. It is a common misconception that some tequila contains a ‘worm’ in the bottle. Only certain mezcals, usually from the state of Oaxaca, are ever sold with worm, and that only began as a marketing gimmick in the 1940s. However, this misconception continues, despite effort and marketing to represent tequila as premium liquor.