Food grade PP5 material The bento lunch box is made of high quality accessible food grade PP5 material, BPA free plastic. Safe to pack food with cutlery and fork, reusable, stain-resistant and washable. Can be used in microwave oven and refrigerator The lunch box is specially designed for microwave ovens. When using in the microwave oven, the sealed lid must be removed. It can withstand high temperature up to 120C, or freezer storage boxes can be refrigerated in the refrigerator and can withstand cold up to -20C. Sealed and leak-proof The lunch box lid has a high-quality and tight sealing ring that fits snugly against the edge to prevent spills, and the snap-on lid forms an airtight leak-proof seal, perfectly preventing food leakage when carrying. easy to clean The lunch box containers is made of double-layer design and the interior can be disassembled for easy cleaning to ensure the cleanliness of the lunch box. easy to carry The meal prep container can be used in the office, school, outdoors or while traveling, fits easily into most lunch bags, and is compact and easy to carry.