Glade Solid Air Freshener, Deodorizer for Home and Bathroom, Clean Linen – Link

Amazon has this currently marked down to 72¢.

• Available in a wide variety of rich fragrances at great value
• Can be easily placed anywhere in the home for continuous, long-lasting freshness
• Simple to use solid air freshener with no outlets or batteries needed
• Adjustable gel air freshener cone allows you to release just the right amount of fragrance for your home