There are plenty of different 3D printers to choose from these days, from the popular Makerbot Thing-O-Matic to the budget-priced Solidoodle. These all have one drawback however in that they aren't exactly portable. Most need to be disassembled to be moved and even the fully-assembled Cubify printer isn't really built for travel. But now, two MIT students have developed the PopFab, a machine that does 3D printing and more, all while fitting inside a small suitcase.