A mason jar vacuum sealer is a device used to remove air from a mason jar, creating a vacuum seal that helps to preserve the contents of the jar. This can be useful for storing food, as it prevents spoilage and extends the shelf life of the food. Vacuum sealers can also be used to store other items, such as documents or valuables, as they help to protect the contents from moisture and dust.
Mason jar vacuum sealers are relatively inexpensive and easy to use, making them a great option for home use. They are also a more environmentally friendly option than using plastic wrap or aluminum foil to seal jars, as they can be reused multiple times.