Ecozone Forever Flush Toilet Block is an innovative alternative to toilet rim hangers, that instead sits discretely in your toilet cistern for up to 5 months. Encased in a fully recyclable exterior, the block is designed in a way that it gradually releases the solution inside when it’s penetrated with water. Once you flush, the sanitised water (either blue or purple) filters into the toilet bowl, cleansing and descaling your toilet in one.