The purpose is to watch the person who made the lunch, make it, while you eat it. And also, so the preparer can watch you eat it. A never ending cycle. Researchers at Ochanomizu University have embedded a camera and LCD touchscreen into a lunchbox (bento). The video starts playing as soon as the box is opened, and likewise, recording begins. The team wants to make the camera smaller and add a bit of video editing ability to the lunchbox (a sentence rarely uttered in history).
The teams purpose is to spread the love on making and enjoying the lunch, but they fail to see the real potential. Watching TV shows, movies, youtube videos over lunch. I'm sure this device will pop up in the news again, in a leaner, better form. Good luck researchers.