LARGE 32 OZ CAPACITY MAYONNAISE MASON JAR: Designed for preserves, sauces, fermenting, kombucha, pickling, canning, and dry food storage. REGULAR MOUTH OPENING: with a finish of 70-450 these glass containers are made for canning, fermenting and pickling for long periods of time. The metal lids with plastisol liner will keep your food fresh for months without leaking. Perfect for homemade pickles, peppers, jams, olives, beets, carrots, horseradish, peas, sauerkraut and more. METAL AIRTIGHT BPA FREE LIDS: with an inner rubber seal will keep the contents airtight and secure without leaking for months and months. Great jars for kitchen organization and even beverage drinking. MADE IN USA: with 100% Recyclable Glass - Eco Friendly Production. SATISFACTION GUARANTEE : At Kitchentoolz we are committed to producing quality products that we know you will love. If for any reason you are not completely satisfied, contact us so that we can be of assistance.