An ocarina with six holes in front, two holes in the back. To play the base note, cover all holes with fingers and thumbs and blow gently on the mouthpiece.
This ocarina's flat and round shape makes it ideal for carrying around in a pant or jacket pocket. Prints quite quickly - the one in the pictures above only took me an hour and a half to print.
The "upright" file is the design with built-in supports that I generated using Meshmixer when my printer having some trouble with the overhangs (the end of the mouthpiece and some of the holes were coming out a little crinkled). If you print this one, take care when removing the supports.
Notes: The larger you can print it, the better. It sounds much better when scaled up, also it is much less fragile.