Keep your compost bin smelling fresh with the Avanti® Replacement Charcoal Filters. Equipped with natural odour-absorbing activated charcoal, the filters will neutralise the smell of food scraps and organic waste. Sized to fit snuggly in the domed lid, they let the much-needed airflow of oxygen in to aerate, resist the intrusion of pesky fruit flies and not allowing the stinky smell out