I was extremely puzzled on how this could even work so it's taken me about 6 months to use and review this. I use ionic water for many of the steamers I have... iron, floor, general and thus far it's given me plenty of use just from one bottle. I purchased one bottle and one came free with the floor steamer I purchased from Amazon. Previously, I have bought ionised water for my iron which costs 4 pounds for 5 litres. I paid 4 pounds for 10 litres, which I think is a bargain. It hasn't gone to the red colour as yet so i'm happily filling up, shaking, using and reusing.