gotmilk Apt query for the end of this puzzle Ad slogan since 1993 Ad question since 1993 Ad campaign featuring white mustaches Ad campaign featuring "mustaches" Ad campaign almost dismissed by its creators for grammatical inaccuracy Noted dairy line Dairy line? Oft-used dairy ad query Oft-riffed-on ad slogan since 1993 (California [dairy product] Processor Board) Campaign whose first ad was directed by Michael Bay