Thwon is a type of alcoholic beverage. It is prepared on festivals and special occasions by the Newar

Newar

The Newa , Newār or Newāl) are the indigenous people and the creators of the historical civilization of Nepal's Kathmandu Valley. The valley and surrounding territory have been known from ancient times as Nepal Mandala, its limits ever changing through history.Newas have lived in the Kathmandu...

s. It is brewed from rice. This is a kind of Country Beer.Generally we can also called Rice beer.

Types

It is of two types-

• Red
• White

The red variety is closer to wine. The white variety is thicker in consistency and can be very sweet.

Cultural significance

This drink is very closely related to the culture of Newars. It is an indispensable part of Newari rituals and festivals.
http://www.dauglydevil.com/2008/03/importance-of-wine-in-newari-culture.html