Kopi luwak (Indonesian pronunciation: [ˈkopi ˈlu.aʔ]), or civet coffee, is one of the world's most expensive and low-production varieties of coffee. It is made from the beans of coffee berries which have been eaten by the Asian Palm Civet (Paradoxurus hermaphroditus) and other related civets, then passed through its digestive tract. You can find more out at Wikipedia.
If you are walking through Hanoi, Vietnam’s coffee-mad capital you might be seeing a lot of coffee shops with cryptically named vessels with “weasel coffee.”
There are some different Vietnamese java across the city, including the sublime ca phe sua da, iced espresso blended with sweetened condensed milk, which you might give a try.
The weasel or more like a civet cat is native to Southeast Asia’s jungles. Many coffee producers use captive civets today, but the process remains the same. Civets are fed robusta coffee cherries, the coffee plant’s fruit. The civet’s digestive enzymes partially ferment the fruit’s stones—coffee beans—and strip much of their harsh flavors. After a thorough washing, the “dung” beans are roasted and ready for brewing.
You can get cup at 55,000 Vietnamese dong, or $2.70, somehow more expensive than a typical Hanoi cup. On the other hand real cheap as certified civet-fermented coffee produced in Indonesia and the Philippines, can sell for up to $600 per pound.
So how can it be that cheap here? Vietnamese coffee makers have perfected a roasting process that mimic’s that of the digestive tract of the weasel, clever folks! You shell out a whole lot of cash for a specially roasted bean.
One of the better known coffee makers and reliable has some information on the website http://www.trung-nguyen-online.co.uk/legendee.html