The Arm & Hammer Fridge-N-Freezer Baking Soda is a specialized, spill-proof deodorizer box engineered with dual-sided flo-thru technology.It features tear-away front and back panels that expose a breathable mesh screen, allowing maximum airflow to pass through the pure sodium bicarbonate while keeping the powder securely contained. Designed to actively absorb and neutralize stubborn food odors, a single box provides continuous freshness for up to 30 days and includes a top panel to track the installation date.