For a long time, Reese's was very adamant that chocolate and peanut butter combined needed to be explained. One thing that doesn't need to be explained is how integral Reese's is to the Halloween experience. We all know how coveted those peanut butter cups are in your trick or treat bag. I'd share some of those Tootsie Rolls, trade a Jolly Rancher... but you'd likely get stabbed over a Reese's. It's such a part of the holiday that the annual bat, pumpkin, and ghosts editions are a tradition almost as important as plastic fangs. There's no mystery as to why the package is orange.