Minimalist M3 Bottle Opener
thingiverse
A minimalist bottle opener design is presented here, which features an M3 screw that safeguards the plastic. To assemble, just print and insert an M3 socket head screw; no other tools are needed besides a bit of force. For optimal performance, it's recommended to use high infill, but 100% infill is the lowest I've tried so far.
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