"The caxirola as with the vuvuzela, is the ball of the fans, " explained Brown.
CNN: Brazil unveils shaky answer to the vuvuzela for World Cup
2.
So, whoever wins the 2014 World Cup can blow their own whistle -- or do the caxirola shake.
CNN: Brazil unveils shaky answer to the vuvuzela for World Cup
3.
If the caxirola follows the fate of the vuvuzela or rattle, Brazil has a Plan B involving the production of a plastic version of the indigenous pedhua whistle, which mimics bird calls.
CNN: Brazil unveils shaky answer to the vuvuzela for World Cup