DeLonghi EcoDecalk is a decalcifier for all kinds of coffee machines. The liquid decalcifier is made from 100 % natural and degradeable ingredients (lactic acid). The liquid is also easy to use compared to powders or tablets. The package contains 2 x 100 ml portions for two decalcifying operations. The 200 ml bottle allows for 2 uses. The 500 ml bottle allows for 5 uses.