Keep your OXO Good Grips Crisper running effectively with the OXO Good Grips GreenSaver Crisper Insert Carbon filters last 90 days. The GreenSaver Crisper Insert is designed to be mounted to the wall of your crisper to keep it above the produce in a crowded drawer and features an open-vent design to ensure maximum airflow and absorption of ethylene gas. Suction cups or tape allow you to place insert above produce in crisper to ensure maximum absorption Polypropylene (PP). Hand wash BPA-free. Limited lifetime manufacturer's warranty. Imported.