The Purple Heart whistle is not part of Erik's continuous catalog. As of recent he has made only 3 of these Purple Heart whistles as an experiment. They turned out beautiful, the sound is very similar to the Cocobolo whistle.
This handmade whistle has been crafted by the great Erik the Flutemaker. The body is made of cocobolo wood, and the mouthpiece is the popular Susato ABS fipple. The tone is much fuller and organic than a regular tin whistle.