Sounds like the glue on the back of the emblem got soft and the emblem came off. You may be able to just push it back on, but I would clean the area on the tupperware first. If it won't stick, you can add some glue to the back of the emblem, but I'm not sure that is the best thing for the plastic. Your best bet may be to just buy a new badge and replace the old one. I've never had that happen to any of my Wings. Must have been really hot or in direct sunlight that heated it up.
At most auto parts store I know NAPA has it, you can buy some 2 way emblem tape, It's gray with red tape that you pull off, it works great. I used it to replace the chrome piece around the tail light on my 08 when it was replaced under warranty.