The lunch box is made of high quality food grade silicone, non-toxic, SGS. Portable folding lunch box, lightweight enough to carry anywhere. Better safe than general plastic material. Suitable for microwaves and refrigerators, safe for your health. Silicon collapsible lunch box is perfect for Indoor Food Storage, Such as at home, bar, and restaurant, and also includes outdoor activities, such as office, school, picnic, company, camping, hiking, travel, and more. Microwave, Oven, Freezer, and Dishwasher Safe. Silicon storage containers are easy for you to store and save you a lot of space. Size: S,5"*3.5"*2.6"; M, 6.3"*4"*2.6"; L, 7.1"*4.5"*3"; XL, 8.3"*5"*3".