This was my first attempt at a whistle that is compact, fast to print, and doesn't take much filament. I designed this because I'm printing and donating whistles to various groups around me in Chicago.

This is pretty loud at around 100db, and shrill due to each chamber being slightly different volumes, creating warbles that are attention-grabbing. It is compatible with keychains.

V2 is here, which is faster to print (except on Bambu X1-Cs) and takes less filament.

Printing I've only ever printed this out of ABS or ASA, but assume PLA would be fine.

• layer height: 0.2mm
• walls: 3
• Infll: 30%
• Bridges -- Make sure the bridge orientation looks correct, you may need to adjust “external bridge infill direction”

Happy printing and stay safe!