WARNING: this product is intended for use by children aged 3 and over. To avoid danger of suffocation, please keep the packing poly bag away from babies and children. The packing poly bag is not a toy. CPSIA cautionary statement: no_warning_applicable / choking_hazard_small_parts. Insulation & Freezing: the bag inside used the insulated 4mm thick PEVA lining,which provide great insulation to keep the food warm or fresh up to 5 hours. Very convenient to take food for work, office, picnic, camping and other activities. Dimension & Capacity: this lunch box comes with two sizes: Small size: L8.3 x W4.7 x H6.7 inches, capacity: 4L, Medium size: L10.24 x W5.91 x H8.66 inches, 8L. Actually, the small size one can fit 6 cans of cola or 2 standard bento boxes+some fruits, it is a good choice for women. And the medium size one is a normal size of lunch bag. Construction & pockets: 1 main compartment with zipper closure(double zips in YKK), 1 interior zip mesh pocket can fit paper napkin, handkerchief, keys, or cellphone. Outside 1 insert pocket in the front of the bag for small essentials.