The world's most expensive coffee is civet coffee (Kopi Luwak). It is unusual in that the coffee bean has to pass through the [[digestive system]] of [[civet]] (an Asian cat), which mellows the bean. | The world's most expensive coffee is civet coffee (Kopi Luwak). It is unusual in that the coffee bean has to pass through the [[digestive system]] of [[civet]] (an Asian cat), which mellows the bean. |