Not only can it be used as a lunch box, but also as a storage container at home, depending on the purpose. Nesting for compact storage. Microwave safe if the lid is removed. When you finish eating your lunch, you can nest it in a compact space and take it home. Very convenient as a storage container for your food. Can be placed neatly in the refrigerator. When not in use, it can be stacked and nested into 3 compact items.