Carnyx

Build your own ancient Celtic carnyx horn! While this 3D-printed carnyx may not sound exactly like its bronze predecessor, it at least looks like it.

The head is inspired by the main image in this article:
https://mymodernmet.com/celtic-carnyx-played-live-video

It's also possible to use it as a stylish tabletop speaker like this, with the included stand.
(I haven’t published the Carnyx app anywhere. At least not yet.)