The Epson ET-4760 has an excellent supertank ink system. Instead of using traditional disposable cartridges, it has four high-capacity ink tanks that you refill yourself. They hold a lot of ink and last a remarkably long time. Even if you’re printing very regularly, you won’t need to refill the tanks often, let alone buy new bottles of ink.
While you can technically fill the supertanks with any third-party ink, we didn’t try it and don’t recommend doing so. Low-quality ink could damage the print heads, and, unlike standard inkjet printers, the ink can’t be simply removed if there’s a problem. Using third-party supplies could also void your warranty.