" Although the custom is relatively recent, larvae are used
frequently by several brands of mezcal to give flavor to the drink.
A whole larva is deposited in the bottle, normally after having
previously been cured in pure alcohol. Nacional Vinicola (NAVISA)
was the first company to add a worm to its Gusano Rojo mezcal.
Andres Paniagua and Jacobo Lozano, creators of Gusano Rojo
and Dos Gusanos, first introduced the practice of adding larva
to mezcal.[citation needed] Today, several brands are doing this. "