I wouldn't describe myself as the creator but I was part of the impromptu band:
At a hotel function room at night after a day working at the Gael Linn youth festival Slogadh, one of the Gael Linn staff organised us to fill empty drink bottles with water to different levels, so that among us we had a musical scale on our bottles. He then conducted us, indicating who should blow and when, so that we played recognizable tunes. It was a crazy spur of the moment performance with someone who had the skill to get it together.