Type of Whistle

[Coo Kullan]

On holidays in benalmadena 3 years ago there was a street vendor on the promenade. He was doing bird whislting and imitations of cats. The whistling was done with the assistance of a small whistle placed in the mouth. I purchased one and after some practise managed to get it to work.
It was made up of three circular materials folded in half. A stiff paper circle with a hole in the middle, a very light pastic disc and a metal disc with a hole in the middle. The metal disc was placed over the plastic and then over the paper, everything was then bent in half the metal disc locking the plastic onto the paper.
You placed the whistle in your mouth on your tongue and you vibrated your lips.
Does anyone know where I can buy these in bulk?

[Coo Kullan]

I finally tracked it down it is called the Birdy Whistle!