This is a useful round container with a screw top. The outer diameter is 37 mm, inside diameter 27mm.
This can be printed without supports to test your printer. The thread has a built in 0.4mm tolerance and should screw on smoothly. You can download the STL file from the bottom of this post. The compressed file contains two STL files. One for the top and the other for the bottom part of the container.
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