Are you on the move constantly? If yes, then Jack-in-the-box might be just perfect for you! This mobile shelf does away with any need to construct new shelves in every nook and corner of a new establishment. The concept is envisaged by Jens Rohdenburg and is designed especially for “urban nomads”. The hanging shelf promises to be a great space saver, making it apt for the constricted apartments of this day and age. And if the owner chooses to make Jack invisible for the day then he may simply tuck it in the space-saving box. Obviously this feature makes it easy to carry it around too. Seems an outright winner to me.