Solid 3 pack dehumidifiers
Used these in each of my closets to help get rid of moisture that can create a musty smell over time especially since there isn't as great of ventilation in these closets.  Very easy to use as you peel off the silver film on top and place the blue lid on.  Never used one with charcoal odor absorbers, but so far it's been working great collecting moisture and the box is filling up.  Says it can cover up to 300 square feet. Haven't tried to test that as I'm using it in my closet which is smaller square footage.  No chemical smell either.
Rating: 5 stars