Waste less and save more with OXO GreenSaver Crisper Insert. The Crisper Insert features all-natural, non-toxic activated carbon filters, made from coconut husks, that trap and absorb ethylene gas, slowing down spoilage and keeping fruits and vegetables fresh longer. The Crisper Insert features an open-vent design to ensure maximum airflow and absorption of ethylene gas. Carbon filter is designed to last 90 days.