Epson 115 ink refers to a lineup of original Epson EcoTank ink bottles used in refillable ink-tank printers. These are 70 ml spill-proof bottles containing pigment or dye-based ink engineered for high-volume, low-cost printing with good color accuracy and reliable results. Epson 115 inks are part of the Claria ET/ET Premium system, offering durability and a cleaner refill process compared to traditional cartridges.