Craftsman Ramon Vidal works on a "virola" (metal cap) for a mate tea set in his workshop in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)

Photo taken on April 19, 2017 shows mate tea sets created by craftsman Ramon Vidal in his workshop in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)

Craftsman Ramon Vidal arranges tools to make mate tea sets in his workshop in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)

Craftsman Ramon Vidal works on a tube for sipping mate tea in his workshop in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)

Craftsman Ramon Vidal works on a "virola" (metal cap) for a mate tea set in his workshop in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)

Craftsman Ramon Vidal holds a mate tea set in his workshop in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)

Craftsman Ramon Vidal makes mate tea sets in Buenos Aires, Argentina, on April 19, 2017. Mate tea is a type of herbal tea which is very popular in Argentina. (Xinhua/Martin Zabala)