Joseph Joseph 30005 Intelligent Waste Replacement Carbon Odor Filters for Totem Titan Compost Bin, Pack of 2, Black Activated Carbon Filter Refills Helps absorb unpleasant odors Discreetly integrates into the underside of the lid Works with the fresh air to trap smells For Totem 60, Totem 48 and Totem 50 intelligent waste units