LadyBag won't let you leave home without your wallet

Forgetting essential items at home, like your wallet or cell phone, may soon be a thing of the past, thanks to six women attending the School of Interactive Arts and Technology at Simon Fraser University in Canada. These students have developed a purse called the LadyBag that keeps track of its contents using RFID sensors.
The RFID sensors are small enough affix to anything you don't want to leave behind, which the ladies assume would include your wallet, keys, and cell phone. If one of the tagged items is missing from the bag, a small icon that represents the missing object lights up on the outside of the purse to alert you before you walk out the door.
Another function of the LadyBag is its ability to display its owner's emotional state, based on physical interaction with the bag. The bag has sensors throughout, so if its carrier wants to show the world she's happy, she can hug the sides of the bag to produce a smiling emoticon. Fiddling with the zipper produces a nervous emoticon.
The LadyBag's fun, young women creators created it with fun, young women in mind. So it's perfect for those who wish to express themselves or just need a little help keeping track of their gear. I doubt it will be in stores anytime soon, since this bag is still in prototype form. But the ladies are working on making it available to all someday.