The air is sucked out of a plastic bag by a vacuum sealer, which creates the best conditions for storing raw protein, uncooked grains and even whole coffee beans. The cost of a food vacuum sealer alone is justified by the need to keep your food fresh and undamaged until you have the chance to eat it. Food prices are rising. Anyone who hunts, loves to buy in bulk and freeze, enjoys defrosting pre-portioned amounts for meal preparation, or prepares sous vide will find it to be a very worthwhile investment.