I just thought this was a clever fix to an annoying event. Ever had a co-worker steal your lunch? Of course, no one will confess and you either go hungry or you have to go out and get something at lunchtime.
Problem solved with the Anti-Theft Sandwich bag. Basically this is just a regular sandwich bag that has been specially prepared with some green spots that resemble mold. But when the normal sandwich is placed inside, it is not something anyone would look at and want to eat. Of course, you might find that people find your lunch and throw it away.