Ball Wide Mouth pint (16 oz.) glass preserving jars are ideal for fresh preserving recipes such as salsas, syrups, sauces, fruits and vegetables. These famous glass jars and closures go beyond fresh preserving to help you with serving, creative decor, and gift giving. When it comes to canning, there's nothing more important than a quality seal. It ensures that no oxygen gets into the canning jar after processing and that your food will remain preserved just the way you created it. The 16 oz. measurement is when the jar is filled to the very top.