It keeps food hot or cold. It is multipurpose lunchbox which can be use in 3 different ways -container separately, bag separately, spoon separately. when you are in mood of carrying only pulao, khichdi you can just carry 1 container. They are air /liquid tight, which makes it leak proof and easy to store or carry along to work or school. It has 4 side locking lid contain which prevent from leakage of food.