Functionality:
Vacuum sealers extend the shelf life of food by preventing spoilage caused by oxygen exposure, which inhibits the growth of bacteria and mold.
Types:
There are external vacuum sealers, which suction air out of bags, and chamber vacuum sealers, which remove air from an entire chamber, including the bag.
Benefits:
Vacuum sealing helps prevent freezer burn, maintains food quality, and can be used for various items beyond food, like protecting documents or valuables.