Quote from Forum Archives on May 17, 2001, 5:34 pm

Posted by: cyberkat <cyberkat@...>

FREEZING IN GLASS CANNING JARS

It is O.K. to freeze in glass if you take the following precaution. Regular freezer jars are slant-sided. If you use a canning jar that has a shoulder (where the glass rounds inward) you must be careful to leave adequate headspace. When the fruit freezes it expands, and if it can't slide upward easily it will break the jar when it hits the "shoulder". Jars may be hard to stack and take up more room than some other choices. I use square plastic cartons that stack nicely and nest for storage to be used next year. The frozen fruit also slides out more easily for use in ice cream if it is not in a jar with shoulders.