The Fresh Air compost collector lets oxygen move through your organic kitchen waste, for slower stink-free decomposition. Patented design lets air flow through for less odour , prevents nasty build ups & fluid. Opens easily with a push of a button. Easy to clean and empty for less mess. Ready to use, including five compostable bags. Perfect size for home and office (5.7L). No special filter required. Recycled plastic, partially recycled steel.