I used evanphi's design but altered it to fit a wider mason jar and to be able to be closed without unscrewing it first. Also included is the option to use a brad nail for the point instead of plastic.
Print the lid without supports and either of the two bottom parts with supports.
If using the brad nail version, you can heat the nail with a lighter and stick it into the hole, then trim the top of it with wire cutters.
The author remixed this model.