What highly concentrated liquid is formed in the bottom chamber of the South Indian apparatus?

Answer

Decoction

The unique South Indian filter method utilizes a specialized two-chambered metal device where hot water slowly drips through finely ground coffee in the top section. The result collected in the lower chamber is a potent, highly concentrated liquid specifically termed the decoction. This decoction serves as the powerful foundation of the beverage and is traditionally mixed with hot, frothed milk and sugar rather than being consumed immediately as a standard single-serving shot.

What highly concentrated liquid is formed in the bottom chamber of the South Indian apparatus?
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