VANVENE Stainless Steel Insulated Square Lunch Box for Children, Kids and Adult, Portable Picnic Storage Boxes, School Student Food Container with Spoon (Blue) Size: L: 7.08 in / H: 3.14 in, Capacity: 2 layer: 0.7L/700 ml.Please notice: that the air hole should be opened before you open the Lunch Box, Air hole's design let you open the box more easy. Materials: Food grade 304 stainless steel + food grade PP, phthalate-free plastic, BPA-free, FDA-Approved. Note:it could keep food warm/cold in 1~2 hours.. Suggest consider other items if you want keep much more time, so we also donnot accept the reason ( can't keep warm long time) to refund. Bento lunch container- perfect for all type use, great for school, office, picnics, food storage, and every day use. Suit for adults and children. ***Note: it could keep food warm/cold in 1~2 hours.