Many printers use cartridges and toner cartridges, but there are also printers with an ink reservoir. You buy ink bottles for these printers instead of ink cartridges. All you do is pour new ink into the reservoirs and the printer is ready for use again. Consumption costs for printers with ink tanks are low, and it also takes a long time to run out of ink. These printers are especially suitable for users who print a lot. Most models have the ink reservoirs on the front, so it's easy to see the ink level. You'll know when you have to buy ink bottles again.