Lunch Bugs are sandwich bags with bugs printed on them to help deter lunch theft. They're basically a variation of the already-existing mold-bags and will run you $7 for a 24-pack. That makes them almost $0.30 apiece, which is a little steep for a bag (I pay $0.99 for snack pack Doritos and get a meal AND condom out of the deal). Still, maybe lunch theft is serious problem at your work. Don't get me wrong, it is at mine too, I've just learned to deal with it. GW uses 'announce he put boogers in his sandwich'. It's super effective!
Thanks to Leftover, who just hides sandwiches in the middle of a big tub of salad. Smart.