When passive-aggressive emails and refrigerator notes fall short—it might be time for a new and more creative method of getting co-workers to stop stealing your lunch.

Anti-Theft Lunch Bags are zip-lock sandwich bags designed with green mold-like splotches printed on both sides. Although this might be effective in deterring some low-level office thieves—the more aggressive ones will surely investigate further and upon discovering the trickery will only be encouraged to eat your dessert too.

Although temporarily out of stock, more information on buying the Anti-Theft Lunch Bags can be found here.

[via The Awesomer]