Le Parfait French Glass Canning Jar with 85mm Gasket and Lid - .5 Liter by Home Naturals Includes (one) .5 liter Glass Jar Made in France Le Parfait is French for "the perfect," and the French can perhaps be forgiven for this rather bold name. They are heavy, made from thick glass which can handle the heat of the canning process Le Parfait jars are useful for keeping nuts, grains, and other things, as they keep out weevils, moisture, and other unwanted influences from the outside world Le Parfait jars are French jars which have been designed specifically for canning and making preserves.