"The bottles, found in several grocery stores, displayed "Unfaithful" rather than the usual "Focus" message. Obviously, they were fakes; this isn't the kind of collectors' edition that a company generally manufactures. Gatorade naturally issued a statement distancing itself from these creations.
In fact, investigators have determined that the labels are the work of a guerrilla artist in the vein of the infamous British graffiti artist Banksy, making a satirical point by targeting our most precious resources: our celebrities and our consumer goods... And yes, the mysterious unnamed artist could be facing product-tampering charges."
source: Yahoo! Sports