More and more manufacturers are taking the impact their products have on the environment more seriously and ink cartridges are no exception. With this in mind Epson are moving towards the cartridge free printer that instead has refillable ink tanks. This is the T6641 black ink bottle and it is among the first solutions to the issues standard ink cartridges create. One of the key advantages of the ink tank systems is the cost. One ink bottle like the T6641 contains 70ml of ink that can stretch to a staggering 5700 pages! This makes the number of possible prints per pound spent incredible and soon offsets the additional cost of a more expensive ink tank printer.