The world's most expensive and rarest coffee, Corby Nuwak.

Will you be furious when you finally get a can of high-quality coffee beans and be eaten by a cat? The cat can't digest these coffee beans and excrete them almost intact. Are you in the mood to pick the coffee beans out of cat poop, wash them and boil them to drink?

It doesn't mean anything provocative, because some people do, and in this way they make the world's most expensive coffee, Coffee Corbinouak. People who are infatuated with this kind of coffee are convinced that it is this ugly process that contributes to the unique taste of Nouak coffee.

Nouak coffee is not easy to come by and is called "the rarest coffee in the remaining variety". Specifically, this kind of coffee comes from the Indonesian island of Sumatra, where coffee trees grow for a long time. When the coffee berries are ripe, local farmers deliberately put cats into coffee plantations and let them indulge. Not all cats are blessed to enjoy a coffee feast, and local farmers believe that only a kind of palm cat unique to Indonesia is qualified for the job. When the palm cats are full, the local farmers bow down and cover their noses in search of cat droppings. Once they found the target, they knelt down and dug like archaeologists, and if they were lucky, they could find a few whole coffee beans that had not been digested by the cat. Palm cats can digest most coffee beans, and those "surviving" coffee beans have thicker, harder shells that are not easy to digest, just what farmers want.

After the collection work is completed, the farmers wash these special coffee beans thoroughly. After several processes such as deodorization and processing, these coffee beans will serve people's taste buds.

Stringent collection and processing standards make the production of Nouak coffee very low. In the international market, the price of Nouak coffee is always around 1000 US dollars per kilogram, which is a veritable luxury.

Perhaps because most people are out of reach, drinking Nuwak coffee has become a fashion. But even those who can taste Nouak Coffee cannot accept its exaggerated "birth". At a tasting, celebrities savoured every fragrance of Nuwak coffee without being told the truth, and tried to describe their sensory reactions in gorgeous words. Some people say that the coffee has a strong vanilla flavor, some say it has a pure chocolate flavor, and others say it is a mixture of honey and tobacco. However, when people know the origin of this drink, they feel stomach discomfort at the same time. The two expressions of Dennis Basso, a 32-year-old American fashion designer, clearly reveal the somewhat embarrassing secret.

Nouak Coffee salespeople suggest that if you want to use this coffee to entertain a guest, either never tell him the truth, or tell him the origin of the coffee in advance and let him decide whether to drink it or not, lest he overreact. Does the taste of Nouak coffee really have anything to do with palm cats? The answer given by scientists is yes. Palm cat's digestive juices break down the protein in coffee beans into very small particles, which enhances the aroma of coffee during grinding, according to Canadian researchers. In addition, the gut of palm cats can filter out certain proteins, thereby reducing the bitterness of coffee.

The researchers say that the process of coffee beans passing through the intestines and stomach of palm cats is very similar to the wet processing of coffee during fermentation, in which lactic acid bacteria play a key role.