Full Case of 12 - Le Parfait French Super Canning Jars With Bail Lid - 34 oz / 1 liter Le Parfait jars are French jars which have been designed specifically for canning and making preserves. Full Case of 12 Super Canning Jars with Gaskets and Bail Lids - Sizes: 34 oz/1 liter. Le Parfait jars are useful for keeping nuts, grains, and other foods in an air tight environment. They are heavy, made from thick glass which can handle the heat of the canning process.