HIGH QUATITY STAINLESS STEEL - Each container made of food grade stainless steel (inner) and PP5 (outside).BPA-free,safe and non-toxic.
STORAGE CONTAINER -The first upper layer is equipped with silicone ring, which is for putting soup and better to avoid leakage. The second layer has leak-proof silicone ring, no leakage.
PORTABLE LUNCH BAG -The portable lunch bag with adjustable shoulder strap, suitable for kid and adult.
KEEP WARM-The lunch box usually can keep food warm or cold for 1-2 hours, with the insulated lunch bag can keep for 2-3 hours.