The most expensive coffee in the world is Kopi Luwak. The coffee cherries are fed to cats, the beans are excreted, cleaned, and brewed. x_x Yeah. Cat shit coffee. A pound goes for like $600. It's $10 for a ten ounce cup of it. Digestive enzymes break down the bitterness or some such, making it like the smoothest coffee ever. (Apparently. I've never tasted it.)