Sprite - Obey Your Thirst. I thoroughly repsect Sprite’s advertising campaign. Almost all other drink commercials look so stupid after watching Sprite’s ads.
Also, my local radio station has a motto: “Striving to Suck Less”
I had a logic course in college and the professor said he could personally vouch for the slogan “When you’re out of Schlitz, you’re out of beer” (that’s a little before my time, but no his). He told us a about a party he threw, and he had a few different beers so everybody could have something they liked. It turned out the Schlitz was so bad that everybody drank it last. Sure enough, when he was out of Schlitz…