Mason Jars are ideal for food preservation and storage. They are made with durable molded glass with a threaded top. This allows the user to securely seal down a cap with a rubber washer to eliminate leaking or air movement. Mason jars are the ideal storage container for homemade foods such as sauce, spices, herbs, syrup, preserves and much more. They are available in multiple sizes to accomodate storage applications of practically any size.