At £12 per ounce, Kopi Luwak is the rarest and most expensive coffee in the world, but could a drink made out of cat droppings possibly be to everyone's taste?After the disclosure last week that the world's most luxurious coffee is produced via the intestines of the Indonesian civet cat, connoisseurs and regular coffee drinkers assembled to test whether its flavour is really so superior. One of the first participants in the experiment, conducted at the Bramah Museum of Tea and Coffee in London, was Denise Basso, a 32-year-old designer. She was told only that she was tasting the world's...