Material:Made of PP plastic material,BPA free.It is sturdy and not easy to be broken like glass. Odorless, not harm to people. Reusable, can be reused many time after cleaning. Lightweight, easy to carry. Size: There are three sizes for this food container set.Small size-5''L x 3.6''W x 1.7''H, medium size-6.2''L x 4.7''W x 2.2''H, large size-7.4''L x 5.4''W x 2.7''H.When you don't need to use it, you can storage the food container nest inside each other for efficient storage, does not take up too much space. Features:100% seal snap on locking lid, leakproof, odor proof, stain resistant.It is suitable for temperatures below 20C to 120C, microwave?dishwasher?freezer safe.Transparent design easy to distinguish contents of this food container. Occasion:Suiting for students or office workers, whether adult or children.It is the best choice when you go for a picnic.Can also be used to store food frozen in the refrigerator at home. Function:All sizes for your storage needs.This container can hold fresh fruit or food when you meal prep.You can prepare lunch in box, like rice, noodles, soup, sandwich or bread.