Contains an ionic formula, and ionic facial cleansers effectively remove dirt. As the toilet flushes, the cleansing foam helps wash away the dirt adhering to the inner walls of the toilet. Affordable 120g pack, twice as long-lasting and durable, suitable for daily household use for approximately 4-8 weeks (depending on the frequency of toilet flushing). The toilet cleaning block has a water-soluble membrane on the outside, making it easy to take directly with water.