There are all sorts of kitchen gadgets on the market these days, but one of the most useful is the vacuum sealer. These handy devices allow you to seal food in airtight bags, which helps to preserve its freshness and extend its shelf life. Not only are vacuum sealers great for preserving food, but they can also be used for marinating meats or preventing freezer burn. If you're in the market for a vacuum sealer, be sure to check out our buying guide below. We'll cover everything you need to know before making your purchase.