arielCo writes: Those helpful-yet-annoying little stickers on fruits that tell the cashier the variety and brand may be replaced with a CO2 laser etching. Quoth the PhysOrg article: "the laser cauterizes the peel, much like when a laser is used on human skin. The cauterized area is impenetrable to pathogens and decay organisms and resists water loss". Demonstrated on a grapefruit, it is due for testing on "tomatoes, avocado and other citrus fruits". The original paper (abstract) requires a paid subscription.