Malin Nordström, a Stockholm-based jewellery designer creates the most amazing silver jewellery cast exactly from popular candy and snacks. My favourites are the little car (because that is my favourite Swedish sweet), and the cheese puff. Her shop is called Manolin. Malin (below) is wonderful to deal with if you have questions.
She also has such goodies as recipe rings, free text rings, and latitude/longitude rings which can be customised