Penny-Scaled Whistle Opener
thingiverse
After performing some measurements and calculations, I adapted Le_Garage's Whistle Opener (item 4232) to fit a standard US penny. For printing, I followed the TOM Mk7 default settings. To use, simply insert a penny and, optionally, break off the whistle ball using a small screwdriver before enjoying the whistling sound or opening it.
Download Model from thingiverse
With this file you will be able to print Penny-Scaled Whistle Opener with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Penny-Scaled Whistle Opener.