Yerbomatófono
The yerbomatófono, also known as yerbomatófono d'amore, is an informal musical instrument traditional to Argentina and Uruguay. Origin 
Its origin presumably dates back to the aboriginal cultures of the Río de la Plata and was historically called galleta by the gauchos of that area. Popularization by Les Luthiers 

The instrument was recreated in the 1960s by the Buenos Aires luthier  (28 January 1930 – 16 December 1995) for the informal humorist association Les Luthiers. The instruments is essentially a kazoo made up of halved maté gourds whose sound is amplified and distorted by the hollow shell. References

Aerophones
Yerba mate
Uruguayan musical instruments
Argentine musical instruments
Reconstructed musical instruments