de.wikipedia.org/wiki/Mate-Strauch
Tereré or Tererê (of Guaraní origin) is an infusion of yerba mate (botanical name Ilex paraguariensis), similar to mate but prepared with cold water and ice rather than with hot, and in a slightly larger vessel. It is originally from Paraguay, and is found also in northeastern Argentina and southern and western Brazil. The Guaraní people call this infusion ka’ay, where ka’a means herb and y means water.
First invented by the Guaraní natives who lived in Paraguay and western Brazil (Mato Grosso do Sul) territory that used to belong to Paraguay before the war of the Triple Alliance, Tereré was spread by the dwellers of that region, and for centuries was a social beverage.
de.wikipedia.org/wiki/Terer
