I wanna say (but might be wrong) that if you put 'em in SDBs when they're still jack'o'lanterns, they stay that way if you don't try to take 'em out or mess with 'em. I might be wrong... but if not, something for next Zille-o-Ween!

Jack'o'lanterns preserved? Oh, happy day! NEXT Zille-o-Ween, I'm gonna do that! Thanks, Djabrill!