I can invent on the spot 10 uses for a suitcase that have nothing to do with moving things belonging to a single person together. First of all, you may have a couple packing their items in one suitcase. The suitcase may be used as a chair, as a table, as a structural support, to protect from rain, sun, lasers, alpha and beta radiation, it can be used as a weapon or as a shield, as a makeshift hammer, etc.<p>The problem is in your questions. &quot;Purpose&quot; is not something that is a part of an item. It is a part of our mind.