Apong

Apo, apong, or poka is an alcohol drink commonly found among the Tani tribes in the Northeast India states of Arunachal Pradesh and Assam. It is prepared by fermentation of rice. It is known by various names across different tribes in Arunachal Pradesh and Assam. Many tribal communities of Arunachal Pradesh use apo during their respective festivals, such as nyokum. The tribal people offer the drink, every time they drink it, to the spirits by letting a few drops of it fall on the ground. Other occasions when Apo is served include annually organized ancestor worship ceremonies, the festivals of Bihu, Nyokum, Dree, and others, and annual agricultural programs.

Source: Wikipedia