Goodwill has shelves full of bowls, baskets, boxes, containers, and pots like this one that can be turned into custom candy holders for Halloween. I kept it simple with a pot and the message: Trick or Treat. But go on and get creative with your bad self. Maybe "Boogers & Bones" or "Take at Your Own Risk." What other ideas you got?
Go to Goodwill Akrong blog for the step-by-step instructions on how to create a stencil for your spooky message.