2 Litres of Elsan Blue Perfumed toilet fluid, suitable or all Chemical Toilets, waste holding Tanks and cassettes. Kills germs and prevents odours this fluid is the most effective way to keep toilets clean and fresh. Used and trusted over the years by caravanners, mariners and organisations such as the UN and Red Cross. This Elsan camping toilet fluid is recommended for all users of portable, cassette and pump-out toilet systems in boats, caravans and motorhomes. It is pleasantly perfumed, and ensures safe and hygenic treatment.