Flexible bulb to blow your own horn
cults3d
A versatile device with multiple applications, although I'm still unclear about what those uses are. Check out this video showcasing its print demo and use in conjunction with an air horn: https://youtu.be/aoqQIQZvDz4. The last image and linked video display the bulb attached to one of the three smaller fun horns sourced from Thingiverse; unfortunately, I couldn't find a suitable option on Cults, but I'll continue searching.
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