Crisper Insert, 4.5 x 3.5" / 11.5 x 9cm. 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 is designed to mount to the wall of your fruit and vegetable drawer and features an open-vent design to ensure maximum airflow and absorption of ethylene gas. Carbon filter is designed to last 90 days.