Saving you money by keeping your fruit and vegetables fresh for up to 6 weeks in the vegetable drawer of your refrigerator this remarkable Saver works by removing the ethylene gas produced by ripening foods. It is this gas which causes the rapid deterioration and rotting of plant matter and this unit has been proven to result in up to 80 of fresh produce wastage.Replacement sachets are available and should be refreshed every 3 months.