A cup of Kopi Luwak — the world’s most expensive coffee — can sell for as much as $80 in the United States. If that doesn’t wake you up like your favorite high-octane cuppa, this fact just might: Kopi Luwak is also also known as cat poop coffee. But don’t quit your day job and start adding coffee beans to your house cat’s kibble. The coffee comes from beans that are partially digested and then pooped out by the Asian Palm Civet. The digestive enzyme inside the civet’s gastrointestinal tract change the structure of protein in the coffee beans, which lowers the acidity and makes a, shall we say, smoother cup of coffee.