There's no worm in tequila!
Lots of people make the mistake of thinking tequila bottles should contain a worm but this is completely untrue!
Yes, some Americans-bottled tequila and put a worm in their bottles to impress the gringos and boost their sales, but this is only a marketing ploy and not a mexican tradition.
The worm-in-the-bottle myth is old and tired. The truth has been broadcast and expounded for years by the cognoscenti of tequila, in newspapers, magazines and on the Net.
The use of the worm is exclusive to mezcal, the Mexican standards authority, NOM, prohibits adding insects or larvae to tequila.
Some types of bottled mezcal contain a worm called a gusano, properly a butterfly caterpillar (Hipopta Agavis) - in . You may also get a small bag of 'worm salt' - dried gusano, salt and chile powder tied to a mezcal bottle.
Is the worm even a traditional element in mezcal production? Not according to Del Maguey Mezcal producers: they say it's a recent development, a marketing ploy that appeared only in the 1940s to try and get more attention on mezcal.
When the worm is included in Mezcel this is known as 'Con Gusano', which means 'with worm.' Aside from its consumption with mezcal, the maguey worm is considered a delicacy in Mexico and can be found on some restaurant menus.
The worm is harmless to consume and it is believed in certain traditions that doing this is beneficial to the spirit and locks in the vigour of mezcal.