Fujara flute

The Fujara is a traditional musical instrument from Slovakia. It's originally a shephard's flute. It is played both with a few (typically 3) finger holes and overblown to get overtones. This version is a 3D printed fipple (the difficult part) that can be attached to cheap standard PVC 1-1/4" waste pipes. The length of the pipe should typically be 50 times the inner diameter of the pipe (1,587 mm).
As you may guess from the filename, it took be six attempts to get the fipple to sound properly.
For adding finger holes, there is a good article at http://www.flutopedia.com/fujara_craft.htm