Remedy For Melted Chocolate Candy Bar

Recently on vacation my husband had bought a package of mini candy bars; we were sight-seeing and when we returned to the car, the candy bars were melted. We were thirsty so we purchased a large soda with lots of ice; after my husband had consumed the drink from his soda cup, he placed one of the mini candy bars on top of the ice in his drink cup; replaced the top; after 30 minutes, the candy bar had firmed up and he enjoyed his bite-size candy bar.