This website offers "refills" suggests that they can be refilled. Now provided a refill kit is available and your capable hands, then you can save some money. However, success does pivot on refill ink supplier and "how" the work is done. Some vendors offer "walk-in" refill stations or kiosks that do the work for you. I know Walgreens and Staples do this(at selected stores), etc, but also have available refills already for sale.

tada -----Willy Happy