1.High quality materials: The durable food storage container set is made of unlined 304 food grade stainless steel, which will not crack, rust, or retain taste or odor. The container nesting top cover adopts a sealing groove design, which is leak-proof like a rubber sealing ring, which helps to keep food fresh during the journey. They are perfect food storage containers for snacks, lunch or dinner. 2.Widely Used: Great choice for storing fresh or dried fruits, pretzels, hummus and more! Eco-friendly and reusable lunch boxes suitable for adults enhance portion control. Use metal containers to simplify meal preparation! 3.Convenient to carry: each container has different capacities of 6.5 fl oz (0.2L), 13 fl oz (0.4L) and 23.5 fl oz (0.7L). Food containers can provide sufficient food storage space without increasing the volume of your backpack, handbag or lunch box. Bring the container to work, or travel for snacks. 4.Safe use: 3 stackable nesting plastic lunch box lids are made of non-toxic LDPE No. 4 plastic. The container is made of 304 stainless steel and does not contain BPA, phthalates, lead and PVC.