Description: Innovative Design: The portable insulated lunch box is equipped with an air valve that can be easily opened and closed with just a press. It ensures an airtight seal and maintains freshness through continuous negative pressureDurability: The bento box is made of PP, silicone and high borosilicate glass, ensuring durability and long term useHigh Temperature Resistant: The high borosilicate glass lunch box is made of high borosilicate glass and can withstand temperatures from -20C to 400C, suitable for high and low temperature environmentsStable and Safe: The design of the meal prep container ensures stability and prevents slipping or displacement when placed on an inclined surface. It is also heat resistant and safe to handleApplication: Each package includes a fresh keeping box, which is great for dining out and going to work, and can be used in the microwave and refrigerator Specification: Material:PP SiliconeHigh Borosilicate Glass Size Chart: 10.9cmx10.9cmx6.5cm/4.29inchx4.29inchx2.56inch,Capacity:350ML Package Includes: 1Portable Insulated Lunch Box Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.