The kero cup form originates with the Inca. The original decorations included abstract geometric patterns. After the arrival of Europeans, the kero evolved to include pictorial scenes, a European convention, but its function remained the same. Kero cups were used to drink chichi (maize beer) in ritual ceremonies, for instance in the sealing of a deal or agreement.

Although the kero looks similar to a European or North American colonial beaker, the two forms developed independently. The similarity of both cups in form and function created a link between Spanish and native cultures, reflecting the role of things in building cultural connections.