The Fresh & Save BPA-free airtight food storage containers are designed to work with the vacuum sealer food pump. This keeps food fresh up to five times longer than non-vacuum storage. This set of food storage bags features 2 large glass food storage containers or its also available with BPA-free plastic. Both versions are nestable and freezer, microwave (without vacuum seal), and dishwasher safe. These containers are great for meal prep! Save time and money.