These Multi Purpose 16OZ Plastic Mason JAR is perfect for preserving jams, jellies sauces, mustard & flavored vinegar or jelly, spices, baby food,honey, cosmetics. Glass clear jar is also ideal for fermenting: You can make ferment drinks like kombucha, kefir, sauerkraut, kimchi.The clear durable glass jars can also work as canning jars: You can can and preserve pickle like carrots, asparagus, pears, tomatoes, peppers, and so much more.