This is the Bento Box Mini Size One-Piece Series. It's the perfect size for kindergarteners and elementary school students. Easy to carry, and available in red and blue, two colors. ⚠️Important Notes⚠️ Remove the lid when using the microwave. This is not an airtight container, so contents may spill if tilted. Dishwasher use is not permitted. ✅Product Description Lid: Polyethylene Heat resistance: 60°C, Cold resistance: -10°C Body: Polypropylene Heat resistance: 140°C, Cold resistance: -10°C Body capacity: 350ml