The Donner Party was a group of people who were trapped in the Sierra Nevada mountains and had to go to extreme measures to survive, including cannibalism. Seen in the episode Insatiable, Pete broke the jar reversing the effects on Myka and the others. When people place items (mainly money) into the jar, they develop increasingly severe symptoms of hypothermia followed by extreme carnivorous cravings and sensitivity to light. The pieces are currently in the Warehouse.