The subtlest chewing gum ad ever.
(click ad, via) Though, this Hubba Bubba ad (the bottom ad) is very subtle, too. Via Ogilvy Cape Town, SA, So: While I appreciate a gum ad that doesn't show gum or bubbles, I do have a problem with this idea—I seriously doubt South African schoolchildren are chewing a gum called "Stimorol" (tell me I'm wrong, locals). Previously: Roundup of big bubble gum advertising.
UPDATE: Idea is NOT original.
You suck, Ogilvy, South Africa.