There are two brands of bottled beer available Hit and Dansberg. Dansberg is a wonderful mild beer brewed and bottled in Sikkim. Hit on the other hand is a strong beer.
The other option is to go for the local brew called "Bamboo". It consists of fermented Millet grains in a broad bamboo stem cut to be used as a tumbler. Warm water is added to the container, within a few minutes it acquires the flavour of port wine. It is drunk through a narrow straw also made of bamboo. More water is added to the tumbler when it runs out. With time the flavour of the Bamboo gets milder.
The potency of the drink is dependent on the aging of the millets used. Millets fermented for ten to fifteen days result in a medium to mild drink. Upto three month old fermented drinks can result in a very strong brew.