Shepherd's whistle
They are also produced commercially. Simple whistles may cost less than 1 USD in bulk; expensive ones may be quite ornate. They are commonly made of plastic, aluminum, stainless steel, silver, brass, titanium, Corian, jade, buffalo horn and other materials.
Tin whistle
Kwela is a genre of music created in South Africa in the 1950s, and is characterized by an upbeat, jazzy tin whistle lead. Kwela is the only music genre created around the sound of the tin whistle. The low cost of the tin whistle, or jive flute, made it an attractive instrument in the impoverished, apartheid-era townships; the Hohner tin whistle was especially popular in kwela performance. The kwela craze accounted for the sale of more than one million tin whistles.