If the Mehndi cone or powdered henna is stored in a container that is tightly sealed then it should be applied or used within a year from the manufactures date. This can be done only if the products are kept in a completely and tightly sealed packaging that is air-tight. However, if the user wants to use the same opened Mehndi cone again then the products should be stored in a sealed container where the packaging is resealed and refrigerated. This product can be used within 3 months from the date of opening.