A common kitchen item known for its ability to absorb odors is baking soda, or sodium bicarbonate. This gentle alkaline compound is often used in cooking, baking, and cleaning due to its versatile qualities. When placed in the refrigerator, for instance, it helps neutralize unpleasant smells by chemically reacting with odor molecules. Additionally, baking soda can be used to deodorize carpets, upholstery, and even shoes. Its non-toxic nature makes it safe for use around food and family. Because of its effectiveness in eliminating odors, baking soda is a staple in many households around the world.