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 Carlos Iraldi (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.