The world's most expensive coffee comes from the source of cat shit, musk cat coffee.

Some people buy their own coffee machine coffee beans to make coffee. But do you know what the most expensive coffee beans in the world are? The most expensive coffee beans in the world actually come from civet droppings.

Civets live in the jungle, inhabit trees and come out at night. They eat coffee cherries, but they can't digest the beans in the fruit. As they travel through the civet's digestive and excretory systems, coffee beans are "tempered" with enzymes and acids that remove bitterness and give off a unique fruity aroma. These cat poop coffees are expensive.

Coffee farmers in the Philippines sought to kill civets for eating coffee berries, only to discover that civets made them a fortune. Now, for some farmers, civets are geese that lay golden eggs and are more comfortable in cages.

"We never dreamed we could make money off them." Rustico Montenegro said. The 44-year-old began collecting coffee beans from civet droppings several years ago. Montenegro said he and his wife can pick up as much as eight kilograms of coffee beans excreted by civet cats a day during the coffee harvest season from March to May each year and wash them with natural spring water. A kilo of cat poop coffee beans costs 1200 pesos ($28.75), five times more than regular coffee beans, and the couple earns $230 a day.

Civets have become a magic weapon for many Filipinos to get rich. More and more farmers and coffee growers are caging them in hopes of harvesting more beans. Industry insider Reyes, who estimates that about 80 percent of cat poop coffee in the Philippines comes from captive civets, thinks the practice is a bit "bad."