Crime Scene Sandwich Bags
I have a hard time believing that these sandwich bags will actually deter potential lunch time thieves from nabbing your edibles, but at least it sends the clear message that no one is to mess with your sandwich. Although, on the other hand, it might give some people reason to believe that there might actually be something seriously wrong with your sandwich. I mean, really, would you take a chance at eating some unknown food stuff in a quarantine bag?
($4.01 @ Amazon)