Tejuino

Tejuino is a cold fermented beverage made from corn and popularly consumed in the Mexican states of Jalisco, Colima, Nayarit and Oaxaca. Tejuino is usually made from corn dough, the same kind used for tortillas and tamales. The dough is mixed with water and piloncillo and boiled until the liquid is very thick. The liquid is then allowed to ferment very slightly. The resulting drink is generally served cold, with lime juice, a pinch of salt and a scoop of shaved ice or lime sorbet. Although the drink is strongly associated with the state of Jalisco, it is also commonly found in other parts of Mexico and more recently in Mexican American communities across the Southwestern United States. In Mexico it is usually sold by street vendors in small plastic cups or in plastic bags tied around a straw. In the United States it can be found in Mexican juice bars. The exact origin of tejuino is disputed; however, most Mexicans agree that the drink dates back to pre-Columbian times. The ancient Nahua people of Mexico viewed tejuino as the "drink of the gods" and it is still called this by some Mexicans today.

Source: Wikipedia