Optimus, a Portuguese cellular operator, did a major promotion to coincide with university graduation. In Portugal, apparently top hats have something to do with graduation, so they put 4,000 of these giant orange promotional top hats in each of three major cities. Not my favorite hat, or even my favorite giant promotional hat, but quite striking all the same. Are promotional hats in your future? May I suggest novelty hats?
Also, here’s some video of the setup and the promotion: