"Mate" is traditionally drunk in a particular social setting, such as family gatherings or with friends. One person (known in Spanish as the "cebador") assumes the task of server. Typically, the cebador fills the gourd and drinks the "mate" completely to ensure that it is free of particulate matter and of good quality. The server subsequently refills the gourd and passes it to the next drinker who likewise drinks it all, without thanking the server. The ritual proceeds around the circle in this fashion until the "mate" becomes "lavado" ("washed out" or "flat"), typically after the gourd has been filled about ten times or more depending on the "yerba" used (well-aged "yerba mate" is typically more potent, and therefore provides a greater number of refills). When one has had his fill of "mate", he or she politely thanks the "cebador" passing the "mate" back at the same time.