The tank system, also known as CISS (Continuous Ink Supply System), is an alternative to conventional ink cartridges. Printers with this system use high-capacity ink tanks that can be easily refilled. This system significantly reduces printing costs and is suitable for high-volume users - such as households with children, schools or smaller businesses. The advantage is economical operation and a greener solution due to less waste. Tank printers tend to be more expensive initially, but the investment is quickly recouped.