Korean Square Plastic Steel Lunch Box uses high-quality stainless steels that resists critical temperature and provides no harm to foods in the container. The three-layer setup allows you to separate foods into different containers and does not allow the aroma to mix together. (2.1 Litres only) Suitable for use in school, the workplace, and camping/ Outdoors Acceptable temperature: -20 Degrees Celsius to 100 Degrees Celsius Main Material: Stainless Steel NB: This is not a microwaveable product. Do not apply heat on the product. What's in the box 1 x Three-tier lunch box