cantaro
Cantaro is a traditional unit of volume used primarily in Spanish-speaking countries, particularly in Spain, Latin America, and parts of the Caribbean. The term derives from the Latin *cantare*, meaning "to sing," as the volume of a cantaro was historically based on the volume of wine a person could sing through in a certain time. The exact measurement varied by region, but it generally corresponded to about 1.5 to 2 liters, depending on the historical context and local customs.
In Spain, the cantaro was historically used in the provinces of Andalusia, Murcia, and parts of Valencia,
Today, the cantaro is primarily a historical and cultural reference rather than a widely used measurement.