Kopi luwak begins with a coffee cherry eaten by a civet. The fruit is digested while the seeds pass through the animal and are subsequently collected. Those seeds still require careful handling before they become roasted coffee. The unusual collection method does not replace the agricultural and processing work involved in other coffees.
The source follows the beans through washing, drying and roasting. These stages deserve more attention than the novelty of the story: inconsistent drying or poor storage can undermine a coffee regardless of how the cherry was selected. A seller should be able to identify where the coffee came from and explain the processing and traceability behind the lot.
Claims that digestion removes all bitterness or guarantees a particular flavor go beyond what this description establishes. Roast level, the original coffee and extraction remain relevant. Buy a small, identifiable lot if evaluating the style, compare it with an ordinary coffee of similar origin, and judge the actual cup. Collection claims, animal conditions and food handling also require evidence of their own; a romantic tree-to-cup narrative is not that evidence.
The conversation
A good question can make a better brew.