Packed with the same odor-fighting material used in AllerAir air purifiers, the compact Tub O’Carbon Odor Buster traps odors without the use of chemicals or heavy fragrances. This all natural odor fighter can be used anywhere in the home or office including the fridge, freezer, trash can, next to cat litter, in a diaper pail, in a sports bag, closets, lockers, musty storage, your car, etc. To activate, just peel back the top and bottom labels.