ThinkBamboo 180g Bamboo Charcoal Odor Absorbing Refrigerator Pouch - 3pc Black 3 Black Granulated Bamboo Charcoal Odor Absorbing Air Fresheners. Trap and destroy refrigerator odors, and help prevent flavor contamination. These perfume-free air-fresheners work by trapping odors, and are much more effective and fast acting than the traditional box of baking soda. Put one in each crisper drawer, and one on the top shelf to control odors and prolong the life you your fresh produce. Put them in your freezer to prevent ice cubes from picking up flavors. Re-usable, to recharge the odor absorbing and destroying power of the bamboo charcoal, simply lay the air freshener out in bright sunlight. These air fresheners each measure approximately 6" X 5" X 1 1/2" and contain 180 grams of Bamboo Charcoal.