I bought one of these after writing a post about how to keep your home from smelling like your pet and I can't believe how much better my home smells because of it! I threw one into my hidden litter box (in the living room) and basically forgot that my cats smell at all. I loved it so much I got one for the top of my kitchen trash, which is usually filled with wet cat food containers, old produce, and cat litter. Now there is basically no smell... which makes me forget to take out the trash basically all the time.
Promising review: "While I was traveling I accidentally left frozen chicken and raw hamburger in my car for over a week. Upon my return, I could smell something throughout my entire house. I made my way to the garage and was overtaken by the smell. I opened up my car and saw the meat sitting there. I tried everything to get the smell out. I cleaned the carpets, wiped down the leather, washed the windows, used deodorizer, everything. Although those products helped, there was still this underlying scent of nasty. I bought two bags and put them in my car, within the first three hours I could already smell a difference. These things really do work." —Dalock
Get it from Amazon for $9.95.