Clear SWEET LU does not colour the water therefore ideal for urinals so no stain develops where the water continually runs down Environmentally friendly toilet sanitization & freshener Gives toilets a pleasant Blue look and maintains a fresh fragrance Extremely long lasting - lasts up to 3 months! (Sometimes longer!) Simply punch in the hole on the plastic top, drop jar into toilet cistern and that’s it! SWEET LU will begin to take effect within a few hours!