To preserve a jack-o-lantern, wrap the entire pumpkin in plastic wrap and store it in the refrigerator. Help a jack-o-lantern last longer, even soaking it in water to prevent it from drying up, with tips from a costume and prop designer in this free video on Halloween. Expert: Misty Valenta Bio: Misty Valenta has more than 10 years experience in theatre arts, including costume, prop and craft design. Filmmaker: Jaime Orta