Copper object

art object, probably native American, brass. Any more information, suggestion is welcome. The object is called a "poporo". This tool was used by the native population of the Cundinamarca plains and other regions of Colombia. It was mainly used to mix ingredients such as coca leaves with such minerals as lime. Some of them were made out of gold, and used for chaminc purposes as the combination of those elements resulted in hallucinogenic substances.