EDIT (May 2020): New key ring model available, much more discreet and practical (only in 11mm)
Here are two models of triangular keys, they each have the 4 dimensions of triangles (8mm, 9mm, 10mm, 11mm).
The keys will make it easier for you to dispose of your boxes and recyclable items. Thanks to the 3D yellow garbage key, you're free! Without the constraint of the lid of the very small trash can ...
The standard Cura quality parameters will do very well.
Favour vertical printing and a generous filling (the keys will be fragile otherwise).
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