FOOD GRADE:Each mason jar is made from food grade materials. Great for food storage. HIGH QUALITY & FREE CHALKBOARD LABELS:Thick 4oz glass jars with food-safe, corrosion resistant lids - material meets certified safety standards. These attractive vintage style quilted jelly jars are ideal shower gifts.Make a thoughtful gift - fill with preserves, spices, jams, cookies, candles or honey - and decorate with string, ribbons, bows, or twine to create one-of-a-kind wedding favors. DURABLE:Refrigerate up to 3 weeks, and freeze up to 1 year. Freshly preserve and store up to 1 year. Mason Jars 4 oz With Regular Lids, Ideal for Jam, Honey, Wedding Favors, Shower Favors, Baby Foods,