We had not heard about the Vuvuzela [click on the Wiki link] until the Football World Cup that was held in South Africa in 2010. In the link you can hear a short audio clip of how it sounds [scroll to the bottom of that page]. The link has some interesting information about the Vuvuzela, its use, its misuse, its controversy regarding use by spectators at stadia etc. Let me not go into that much.
I had cut up a half litre PET bottle for something and the top half had to be thrown. Thrown? NO! This was at the same time during the FIFA World Cup and I was reading about the Vuvuzelas in newspapers. *Idea*!
Without me doing anything more, this piece of the bottle now became the vuvuzela! It was created unintentionally as a 'waste by product' and before throwing, I tried 'vuvulelaing'. It worked - more like a megaphone than the vuvuzela. It has no real use at home and at best I may later use it as a funnel to pour something into some container! But to satisfy myself in the 'heat of the FIFA moment' and to participate [silently] in the vuvuzela movement, I wrote on it with a marker pen 'vuvuzela'. That was it.
It reminded me of blowing of the conch shell.