These unwashed coffee beans come from Sulawesi, previously known as Celebes. The most important area for coffee (Kopi in Indonesian) are the Toradja Highlands. Sulawes is known for its high iron content in the ground which gives the Kalossi its own characteristic taste.
Mandheling is a brand or trade name for coffee grown in the north of the island of Sumatra.
In the area of Lake Toba, a lake more than 500 meters deep, Arabica coffee is grown. The name is derived from the Lintongnihuta district.