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Fidget popit keychain — image 1

Fidget popit keychain

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Pop the bubbles back and forth.

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Pop the bubbles back and forth.

The body was printed with PLA and the bubbles were printed with TPU. It works best with Shore 85A TPU but will also work with 95A. 

You can either print a top and bottom and snap them together or print two tops and connect them with pieces of 1.75mm filament.

Set the TPU bubbles in one side, add glue and put the other side on.

FCStd (FreeCAD) files included. I had to mess around with the bubble dimensions a bit to get a good result, so if your particular filament doesn't work well it can be easily adjusted.