How much would you pay for a cup of liquid cat dung?
Quite a lot, if some highly discerning coffee drinkers are anything to go by.
On the lush, volcanic slopes of the Indonesian archipelago, villagers "harvest" kopi luwak. The beans used for the world's rarest and most expensive coffee have already been munched by cat-like palm civets, and now they are plucked from the dung to be dried and roasted.
Retailing in North America and Europe for up to US$600 per kilo, kopi luwak, literally "civet coffee" in Indonesian, is not a brew for the faint hearted.
Less than 230kg of it are estimated to be produced a year on the islands of Java, Sumatra and Sulawesi, and war and disease are making it even harder to find.
"I first read about it in 1980 but didn't manage to get my hands on any until 1993," says Michael Beech of Raven's Brew Coffee Inc. Until last year, when supplies began to dry up, it was the main supplier of kopi luwak in the US.
His clients have ranged from ordinary java junkies to comedy actor John Cleese of Monty Python fame, he says. The firm has a backlog of 300 kopi luwak orders to fill at US$75 a quarter pound.
"To be honest, you can't get US$75 worth of quality in any coffee. You are really paying for the experience," says Beech.
The brew has become so rare that a newly published book on coffee in Indonesia, A cup of Java, relegates it to legend.
"We have failed to find any coffee-seller who admits to actually selling kopi luwak from the feces of the civet cat," write authors Gabriella Teggia and Mark Hanusz.
To many Indonesians, the term kopi luwak has come to mean simply the beans which the civet -- a notoriously fussy eater which selects only the ripest coffee cherries -- would choose.
"We just use the name for branding, but we don't trade in it," says Jeffrey Susanto, whose family runs the Kopi Luwak string of gourmet coffee shops in Jakarta.
GUERRILLAS, CATS AND ELEPHANTS
The rarity of kopi luwak is confirmed by Nugroho Bintang Satrio, the Central Java chief of the Indonesian Coffee Exporters Association.
"Only a tiny portion of small-holders are left who collect it," he said, adding that traders buy it at about 11,000 rupiah (US$1.30) per kilo, about twice the price of ordinary robusta.
In the last year, a government offensive against rebels in rugged Aceh province on the northern tip of Sumatra has also cut into supply. "Farmers get killed if they harvest the coffee too far into the bush," said one trader.
Then there is the bad press caused by the deadly flu-like SARS virus. Civets, which are not cats but are related to mongooses, have been slaughtered in their thousands in China and imports were banned from many Western countries for fear they carry SARS.
"Even if SARS was associated with the coffee itself, by the time it's collected and washed there is a very long period that has elapsed," says Massimo Marcone, a food scientist at the University of Guelph in Canada, who has carried out extensive tests on kopi luwak and deemed it safe.
Yet despite all that, some still have doubts.
"Sumatra, in the popular imagination anyway, is just too close to China and I'm just wary of the whole SARS thing," says Beech, adding that Raven's Brew may cease to offer kopi luwak.
"We are working on an elephant poop coffee," he says with a chuckle, explaining a plan he vows is serious. The plan is to feed coffee to tuskers at an elephant orphanage in Sri Lanka and sell the product, farming the proceeds back into the orphanage.
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