1、Made of food grade silicone, non-toxic and odorless, safe to use 2、High temperature resisting, can be used in refrigerators, microwave ovens, dishwashers 3、It can be folded completely to 1/3 of the original size when not in use, and 3 sizes of lunch boxes can be stacked together 4、When used in a microwave oven, the clip lock covers food safety and the air valve on the lid serves as a vent 5、Easy to clean, lightweight and portable. Ideal for food storage, easy to carry to the office, camping, hiking, picnics, etc This is a foldable silicone lunch box. You can use it to store food, fruit or vegetables in a refrigerator or freezer. At the same time, it is also a perfect lunch box. It is made of food grade silicone structure and foldable body, which is safe to use and easy to carry. Features: Made of food grade silicone, non-toxic and odorless, safe to use. High temperature resisting, can be used in refrigerators, microwave ovens, dishwashers. It can be folded completely to 1/3 of the original size when not in use, and 3 sizes of lunch boxes can be stacked together. When used in a microwave oven, the clip lock covers food safety and the air valve on the lid serves as a vent. Easy to clean, lightweight and portable. Ideal for food storage, easy to carry to the office, camping, hiking, picnics, etc. Specification: Condition: 100% Brand New Material: Food Grade Silicone Temperature Resisting Range: -40℃-240℃ Capacity: 350 / 500 / 800 / 1200mL Folding Size: approx. 350ml: 13.5 x 10 x 3cm / 5.3 x 4.0 x 1.2in; 500ml: 16 x 10.5 x 3cm / 6.3 x 4.1 x 1.2inch; 800ml: 18.5 x 12 x 3cm / 7.3 x 4.8 x 1.2inch; 1200ml: 21.5 x 13.5 x 3cm / 8.5 x 5.3 x 1.2inch Unfold Size: approx. 350ml: 13.5 x 10 x 6.6cm / 5.3 x 4.0 x 2.6in; 500ml: 16 x 10.5 x 6.8cm / 6.3 x 4.1 x 2.7inch; 800ml: 18.5 x 12 x 7cm / 7.3 x 4.8 x 2.8inch ;1200ml: 21.5 x 13.5 x 7.6cm / 8.5 x 5.3 x 3.0inch Weight: approx. 420g Package List: 1 x Set of Silicone Lunch Box(4 pcs) Note: 1. Do open the riser vent before putting the lunch box into microwave. 2. Please allow 1-2cm error due to manual measurement, thanks for your understanding. 3. Item color may be showing slightly different on your computer monitor since monitors are not calibrated same.