Keep your jams, jellies, sauces, mustard, flavored vinegar, and more fresher longer! This set of 12 Regular Mouth Mason Jars have a 16 ounce capacity and are constructed of durable glass. The custom time tested ceiling compound ensures a quality air-tight seal with each lid, and the new brushed silver design on the outside steel lid will match any kitchen design. Refrigerate your goodies up to 3 weeks, freeze up to 1 year, and fresh preserve and store up to 1 year. These mason jars provide extensive functionality and can even be used to serve your guests creative liquid concocotions.