From Thinkgeek:

This Marvel Stark Industries Messenger Backpack is the latest development in mobile computing. With a light-up Arc Reactor on the strap, it’s just showy enough to get other people’s attention (and envy). Mostly, it’s practical, with an organizer under the messenger-bag-style flap and a massive 15″ wide x 10″ tall x 1 1/4″ gusset laptop/tablet pouch inside. And if your device doesn’t fit in there? That’s okay. The main compartment also features padding on all sides, just not as much as the dedicated pouch, and it measures 20″ wide x 12″ tall x 6″ deep at base. Boom. It’s perfect for all the Genius Billionaire Playboy Philanthropists of either gender out there or those aspiring to be one.

[Marvel Stark Industries Messenger Backpack]