Filler For Apothecary Jars

I just purchased a few Apothecary jars for the new house. They are inexpensive, simple accents that will spruce up any room, from the bedroom to the bathroom.

What to Put in Them:
Terrarium, wrapped candy, lemons, shells, soaps, natural sponges, old photos, antique keys/buttons/buckles, beach glass.

Do you have any Apothecary jars around your home? What's in them? What unique ideas would you suggest as a filler?