Used only once. It's clean. The following is a quote: This is a Minion lunch box that is dishwasher safe. [Product Details] Size: Approximately width 14.8 x depth 12.3 x height 5.1cm Capacity: Main body: 360ml, Inner containers: 130ml x 2 Material: Lid: AS resin, Main body/Inner containers: Polypropylene, Fastener: ABS resin, Packing: Silicone resin Country of origin: Japan Remarks: Dishwasher safe, Microwave safe with lid removed [Heat resistance] Main body, inner containers, packing: 140 degrees Celsius, Lid, fastener: 100 degrees Celsius [Microwave-compatible plastic lunch box, children's lunch box, tight lunch box, 1-tier, with inner containers, 1-tier lunch box, children's, dishwasher safe, microwave-safe, microwave, plastic, with inner containers, one tier, one-tier lunch box, one-tier lunch box, children, children's, kids, kids' lunch box, lunch goods]