The LadyBag was developed by six students from Simon Fraser University in Canada, in a project that mixed students from the university's interactive arts degree and the information technology degree.
It is a purse with a built-in RFID reader - the bag displays an according icon with LEDs on the outside if any of a set of objects equipped with RFID-tags misses from it, like your cellphone or keys.
On top of that, the bag has force- and motion-sensors which help detect the owner's mood,
"For example, if the person fiddles frantically with the bag, the face with a worried look will light up. If the owner hugs the bag, a happy face emoticon will light up."
(via artfuture, thx Expertina!)