The Fresh & Save vacuum containers are designed to work with the vacuum pump to keep food fresh up to five times longer than non-vacuum storage. This set of 2 borosilicate glass containers is nestable and freezer, microwave (without vacuum seal), and dishwasher safe. The glass containers are ovenproof (without lid) and double as beautiful serving pieces at the table. These large containers are roomy enough so that you can store an entire leftover dinner.With the Fresh & Save system, you can shop once a week and refrigerate or freeze fresh fruit, vegetables, meat, and fish in our vacuum containers and bags and enjoy the benefits of your own fresh market at home. Prepare your meals days in advance and enjoy them as fresh as the day they were cooked. Cook meat sous vide or marinate meat for the grill in just 30 minutes in the vacuum bags and containers.Here's how it works: Dock the vacuum pump onto the container or bag valve and at the push of a button it extracts the air in mere seconds. It stops automatically once a sufficient vacuum has been obtained, locking in flavor, aromas, and vitamins.