Luminarc Pure Box Active Picnic Container Rectangular 1220 Cc

Brand: luminarc category: storage container shape: square it is made of 100% non-porous glass. Preserves the vitality and freshness of your food with its unique leak-proof feature. It can be used in the microwave oven with the lid open and the ventilation valve clearly visible. You can use the storage container in the refrigerator and freezer up to -20c. High thermal shock resistant hardened extra durable dishwasher safe. Does not contain bpa material*can be nested.

the valve is supposed to open when used in microwave and close when used in refrigerator.