Wheaton resident Sarah Muench, 29, has found most of the caches in a series called "Bertie Bots every flavored bean," based on the Harry Potter books. Muench often goes geocaching in central Illinois with her sister-in-law and mother, who both live in Cissna Park. She said finding the "sardines" cache was one of the most enjoyable parts of the search."We had to be sardines," Muench said. "It was in a tunnel so we literally had to squeeze in the tunnel to get it."