4 Things to Know About the Epson EcoTank ET-5850

It uses refillable ink tanks instead of cartridges You pour ink from bottles directly into the tanks, skipping the cartridge model entirely.

The ink comes in four specific bottle colors Use 502-series bottles: T502120 black, T502220 cyan, T502320 magenta, and T502420 yellow.

The ink lasts a long time The tank system holds enough ink that you will not need to refill often.

Memorizing the bottle numbers is worth it Because refills are infrequent, remembering the exact bottle numbers saves hassle later.