A 1.5 oz. bottle of Big D® will last up to 45 days, depending on the ventilation conditions of the room. This oxidizing deodorant works wonders in public restrooms, sick rooms, smoking areas, and little-used or musty rooms. INDUSTRIAL DEODORANT eliminates any odor from the source through a catalytic reaction which oxidizes odors whenever they meet. The crisp and clean aromatic scent of freshly squeezed lemons.