Ein Mann aus Santa Rosa de Sucumbios schlägt mehrere Paulinia-Ranken zum Herstellen von Yoko, einem Stimulansgetränk bei Erschöpfung und Schlafmangel. Er trägt das Bündel nach Hause, schabt die dünne Lianenrinde ab, wässert sie in einer Kalebassenschale und trinkt davon.

Fidel Lucitante, one of the more important inhabitants of Santa Rosa de Sucumbios on Rio San Miguel, a tributary of the Alto Putumayo river in Colombia, needs a supply of yoko stimulant for a long trip down river. Yoko, a liana, is used as a stimulant especially against exhaustion and lack of sleep when the Cofán have a number of long days of hard work ahead of them. On all trips a supply of yoko is carried and it can be prepared during the trip itself. After a fair amount of searching in the forest Fidel locates the hanging vine of Paulinia, which is used for making yoko, and he takes a bundle of it home. Of this bundle, however, he uses only a few long sections. He scrapes the thin bark of the liana into a pile and later mixes the scrapings with water in a tree gourd. The yoko is thus brewed and Fidel tastes it.