Handheld Vortex Cannon
thingiverse
Create a vortex cannon using a Kirkland brand cup as the foundation. You'll need several key components to get started: A cup with a 22mm hole in the bottom - this will be the base of your vortex cannon. Two size 32 rubber bands, which can be sourced from most hardware stores or online retailers. Other sizes may work, but their effectiveness will vary. A 7" wide plastic bag is also required. I used one that was 10" long, which turned out to be longer than necessary but still suitable for the project.
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