Wrench for 16 oz Thermos
thingiverse
I have a 16 oz Thermos brand thermos which has a difficult-to-unscrew cap. The problem is that the stainless-steel skin of the thermos has lost adhesion to the screw threads. So, you can spin the cap and the threads don't move. This tool provides direct connection to the plastic screw threads and allows easy removal of the cap.
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