Mythbusters would approve
Mythbusters tv show did a test and showed Activated Carbon (charcoal) as the best odor absorber by far and baking soda wasn't even close.  I put this to the test after Hurricane Ike took out my electricity for two weeks and my fridge was really really stinky -it worked wonders.  You can refill these any time by buying a bottle of activated carbon (charcoal) pellets in the fish department at Petsmart.<br /><br />I couldn't decide between 4 or 5 stars because while these serve their purpose, a plastic cup or even a toilet paper cardboard core with some holes poked in it and a bit foil on each end would do the same trick without spending any money on another &#34;uni-tasker&#34;.  On the other hand, these are cute and look much nicer in the fridge than those other options.
Rating: 4 stars