100% FOOD SAFE - Interior is made from high quality food-grade stainless steel which will never rust and is naturally BPA-free. Does not retain flavors or scents, so you can use it over & over again. The exterior and dividers are made from food-grade safe plastic.
EXCELLENT TEMPERATURE INSULATION - Second generation multi-layer insulation can keep your food warm up to 2-3 hours. BUT Please be AWARE that there a couple of things will affect the insulation: (1), the amount of the food in the lunch box. If the food is less than 3/4 of the lunch box, it may reduce the insulation capability. (2), the original temperature of the food put in the lunch box. We suggest heating the food to a temperature high enough in order to provide a good insulation result.
LEAK & SPILL PROOF - Between each stackable insulated compartment are heavy-duty silicone seals to lock in freshness, leaks and odors. Please be aware that the coupling between layers is tight to prevent leak and spill. After using it for a couple of times, it will become smooth.