slide whistle
A slide whistle is a wind instrument consisting of a fipple like a recorder's and a tube with a piston in it. Thus it has an air reed like some woodwinds, but varies the pitch with a slide. The construction is rather like a bicycle pump. Because the air column is cylindrical and open at one end and closed at the other, it overblows the third harmonic.
The following tags are aliased to this tag: jazz_flute, lotos_flute, piston_flute, swanee, swannee_whistle (learn more).
This tag implicates wind_instrument (learn more).