Vacuum machines, also known as vacuum sealers, are appliances used for food preservation. They work by removing air from a package or container and sealing it tightly to prevent air and moisture from entering. Vacuum machines are commonly used to store food in airtight bags or containers, which helps to extend the shelf life of the food and preserve its freshness. They are especially useful for storing perishable items such as meat, fish, and vegetables, as well as for marinating food quickly. Vacuum machines come in a variety of sizes and styles, ranging from small, handheld models to large, commercial-grade machines. They are popular in both home and commercial kitchens for their ability to reduce food waste and save money by extending the life of food items.