The London store, part of the John Lewis group, insists its legion of middle-class shoppers will jump at the opportunity to taste what will become the country's most expensive cup of coffee - even though the coffee beans have spent much of their life inside a cat's stomach.
Caffé Raro, made by the Italian company De Longhi, is a blend of the world's two rarest coffees: Jamaican Blue Mountain and Kupi Luwak, which gets its rich flavour from being ingested by Indonesian jungle cats and harvested from the faeces of the animal.
The proceeds from the coffee, available until the end of the month, will go to Macmillan Cancer Support.