The word Bandung is part of quite a few collocations when it comes to food and beverage naming. Here are some examples: siomay or baso tahu Bandung, mie kocok Bandung, soto Bandung, bakmie Bandung, brownies Bandung. For our Malay friends in Singapore, Malaysia, and Brunei the phrase air Bandung may also be a familiar phrase although we don't have a beverage by that name here.
Of all those names, none is probably more closely associated with Bandung than peyeum, the Sundanese word for tapai or tape.
Tapai or tape as some of you may know is a kind of fermented food made of carbohydrate food source such as cassava or glutinous rice. It tastes sweet with a little bit sour flavor. As you can see in the picture, Peyeum Bandung is typically made of cassava.