How do ball jars work?
by 
chaskies says Geaux
ANSWERS: 2
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I would say, fill it up with some iced Sweet Tea.
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assuming you mean canning jars here when you heat them up and put the lid on as they cool off a vacumn is formed that hold the lid on tight-until air is permitted in it stays sealed--the screw on part really doesnt do much more then provide some protection--hope this answers your question--smile and enjoy the night
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