In a Marvel Universe filled with nanotechnology, Pym Particles and unstable molecules, it was probably only a matter of time before Tony Stark turned his attention to little convertible backpacks like this one. Hey, you can only make so many Iron Man suits before that gets boring; tiny backpacks are virtually inevitable.

What can you put in a 9.5-inch by 13-inch by 3-inch Iron Man Convertible Backpack? Probably not a lot. ThinkGeek contends it wedged in an iPad Air, but there's definitely no room for a standard laptop. Or an Iron Man helmet. You may be able to fit a gauntlet, however.

But if you're an Iron Man fan, this backpack/tote is probably perfect for carrying your phone, tablet and keys to Stark Tower. Or wads of Stark family cash. There's even an Arc Reactor zipper pull. That alone may be worth $50.