IT IS FULLY INSULATED AND SMALL ENOUGH TO FIT IN A CARTERING VAN. FOOD STAYS NATURALLY MOIST AND THE VENT CAP ON THE FRONT DOOR HELPS RELEASE STEAM AND PRESSURE INSIDE. TRANSPORT HOT OR COLD FOOD SAFELY FOR 4+ HOURS, WITHOUT ELECTRICITY. HOLDS 4 FULL SIZE 4" DEEP FOOD PANS. NSF LISTED.