Made of food grade silicone and PP material which are durable and washable. The materials are safe and healthy, totally BPA free. The lunch box is foldable and reusable. Non-toxic, tasteless, odorless, non-stick and easy to clean without the health risks or environmental concerns. It is a divided lunch box with 3 compartments. One box equals 3-piece set lunch boxes. It fits a person's appetite very easily. The individual room keeps each food well without messing together. A sporks-spoon is along with the lunch box on the lid, so no need to take other spoon or forks. The lunch box is foldable. The folded size: 24.5cm(9.65inch) X 17.5cm(6.89inch) X 7cm(2.76inch). The unfold size: 24.5cm(9.65inch) X 17.5cm(6.89inch) X4cm(1.57inch). It only weight 400G that is lightweight when empty. You can put it in your luggage, backpack when you have some outdoor activities. Our lunch box is washable, and it is very easy to clean. Microwave oven and refrigerator are both available and safe. Silicone can stand maximum temperature is 200, However for safety, recommended using temperature is 0 - 40 . Note: when heated in microwave oven, please must make sure to take the lid off. Keep away from fire. It is so easy to carry your containers with you on the go. Perfect for travel, backpacking and camping! The portable solution to your food storage needs. Great for use as lunch containers.