About this item HEALTH AND SAFETY: Lunch box is made of high quality food grade silicone,eco-friendly,non-toxic,Better SAFE than general plastic material. Suitable and safe for microwaves and refrigerators. LARGE USE: Silicon collapsible lunch box is perfect for Indoor Food Storage,Such As Home, Bar, Restaurant; Also Outdoor Activity, Such As Work,School,Picnic,Company, Camping, Hiking, Travel and More. Microwave, Oven, Freezer and Dishwasher Safe.Portable folding lunch box, lightweight enough to carry anywhere. VARIOUS SIZES: 3 sizes meet your need:Small-350ml(prep Nut and Candy for Kids),Medium-550ml(fruit,cake,soup),Large-850ml(sandwich,salad,meal food for man) VALVE DESIGN: Hot gas can discharge and water vapor will not form in the lunch box. So not suitable for liquid ,such as water and soup which can leak from the valve. and when using microwave oven, the breathable valve needs to be pulled up SAVE SPACE: Collapsible Design, Save more than 60% Space for you. No More Cluttered Tupperware Cabinet Silicon storage containers is easy for you to storage and save you a lot of space.Microwave, freezer and dishwasher safe.can be folded to 3cm thick when not in use, saving storage space, or can be used as a dish, changing shape.