The Ladybag purse is for the young professional women, who would like to make sure that they do not leave their cell phone, house keys, or the wallet at home. This bag has sensors to alert the owner when it detects any of those things as missing. Not just that, it can also display the owner's emotions on a LED screen. If the owner hugs the sides, the bag becomes happy, and if she fiddles with the zipper it gets nervous.
The owner's keys, wallet and cell phones are tagged with radio frequency identification devices (RFID), and when those items are taken from the bag, a small screen on the bag shows which object is missing from its contents.