Mexican national drink made from the fermented juice of various agaves, especially the Agave salmiana (75%) and Agave americana. The fermentation is not caused by yeasts, but by the bacterium Zymomonas mobilis. The milky cloudy pulp has only a low alcohol content of about 2 to 6% vol. Pulque spoils quickly and cannot be stored or transported, which is why the drink is hardly available outside Mexico. Pulque was already produced by the Aztecs, they called the Agave "Metl" and "plant of the gods", because they considered Pulque to be their blood. At the end of the Aztec calendar year, the people were allowed to get drunk for five days without any sense. There are numerous finds of cups or goblets from pre-Columbian times in the shape of a monkey; the monkey symbolizes the intoxicated state of the drunk person. Pulque was the forerunner of the tequila invented by the Spanish conquerors; in contrast to this, there is a fermentation but no distillation.