A folding container is a resin-made box that can be compactly folded when not in use. Folding reduces the size to about 1/3 to 1/4, so can be stored compactly during storage and transportation. In addition, containers can be folded and assembled easily and quickly, and can be stacked in both folded and assembled states. There are many capacities ranging from about 20 L to about 75 L, and there are also large folding containers from about 100 L to about 180 L. In addition, some are equipped with lids to protect luggage from dust and some are transparent folding containers that allow you to see the contents. A folding container can be used more conveniently by utilizing an inner bag that protects your luggage from dirt, a cushion that protects your luggage from impacts, or a cold insulation bag.