Introducing the muvuka, Brazil's answer to the South African monotone horn.
It is as light as a plastic vuvuzela, which was both a hit and the scourge of fans at World Cup 2010, but packs a more powerful punch.
It is a simply-made air horn, which you pump to create a loud burst of sound. It is also easier to use because you do not have to master the art of blowing a trumpet to use this, as with the vuvuzela. Using the muvuka is almost idiot-proof.
They retail for about 30 reals (S$17), but if that is too steep, there are always cheaper options like a simple bugle for a third of the price.
Makeshift stores near Brasilia's Estadio Nacional Mane Garrincha hawk the instruments, along with hats, scarves, and T-shirts in Brazil's yellow and green colours.
"It is very good," said a middle-aged woman who sold me the muvuka.
But unlike the vuvuzela, which was widely used in stadiums during the 2010 South Africa World Cup, the muvuka is only really common outside Brazil's stadiums.
Perhaps it is because one may encounter difficulties taking it into stadiums thanks to Fifa restrictions - although I have seen them being used in the arenas.
But I suspect it is because Brazilians are generally a very musically-inclined bunch. Outside the stadium, it is not uncommon to see them dancing and singing to the beat of a drum.
In the arena, their preferred method of cheering on the Selecao is to chant "Brazil! Brazil!" or break into song.
But even though the muvuka has yet to take the Brazil World Cup by storm, this is no mistaking it when you hear it.
The deafening sound is enough to blow you away.
This article was first published on JUNE 24, 2014.
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