Can half gallon jars be used for canning?
Use half-gallon jars only for canning very acidic juices. Safe times have not been established for any other foods. See GH 1455, "Fruitful Canning" for safe canning instructions for juice. Be sure your boiling-water canner is tall enough so the water level is at least one inch above jar tops. This may be a problem with half-gallon jars.
Barbara Willenberg, Nutritional Sciences, University of Missouri-Columbia
Last update: Tuesday, May 05, 2009