This all-natural product has been used in France for generations and is highly concentrated and effective. Simply dissolve a small amount of flake in warm water, pour into the included empty bottle and fill with water. Each jar of flakes contain enough concentrate for 192 loads of laundry! The flakes are pure joy for those who love to clean as they are very versatile. One can use smaller amounts of them to dissolve in water and clean where desired. No household in France is without them!