I can't help but love the "Reese's Halloween Candy Converter." It's a vending machine where some fortunate trick-or-treaters can feed their unwanted Halloween candy (cough *Good & Plenty*) to get a Reese's Peanut Butter Cup in exchange. Now that's a clever marketing stunt!
There's only one machine though and it's in New York City:
Reese’s lovers can make an exchange from 4 p.m. to 9 p.m. outside Washington Square Park on 5th Avenue between Washington Square North and East 8th Street in New York City on Halloween.