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These enable a tight seal on glass jars. By using the 3D design and printing methods described on this site, slip-cast ceramic jars can be made to work with these.
Bail and latch fasteners have been used on glass jars since the late 1800s. They were supplanted by Mason jars (flat disk + screw band). But, the bail and latch design is still in use today because it is reliable, gives a nice airtight seal without needing complex parts and has decorative appeal.
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