A vacuum sealer will help you seal foods in a plastic pouch before immersing it in a water bath. Some people can do it manually, but it may not be as perfect as that of a vacuum sealer. Furthermore, a vacuum sealer will drive all air inside the pouch so that you can cook the food and store for future use.
The best-rated food processor can do many units within a short time and utilizes less energy in the process. Furthermore, such machines produce less waste and thus maximize profits for the owner.