Health and safety: The lunch box is made of high-quality food-grade silicone, non-toxic, SGS, LFGB certified, which is safer than ordinary plastic materials. Suitable for microwave and refrigerator, safe for your health. APPLICABLE TO MULTIPLE OCCASIONS: Silicone foldable lunch boxes are ideal for indoor food storage such as homes, bars, restaurants, and outdoor activities such as offices, schools, picnics, companies, camping, hiking, travel, and more. Microwave, oven, refrigerator and dishwasher safe. Portable folding lunch box that is lightweight enough to take anywhere. Different Sizes: 2 sizes to meet your different needs. Small 350ml (preparing children's nuts and sweets), large 500ml (fruit, cakes, soups). Valve design: heat can be discharged, and no water vapor will be formed in the lunch box. Therefore not suitable for liquids that may leak from the valve, such as water and soup. When using the microwave oven, the vent valve needs to be pulled up. Space saving: The foldable design can save you more than 60% space. No More Messy Tupperware CabinetsThe silicone storage container is convenient for you to store and saves you a lot of space. Microwave, refrigerator and dishwasher safe. When not in use, it can be folded to 3cm thick, saving storage space, and can also be used as a plate to change the shape.