Bloo Toilet Rim Blocks offer a 2-in-1 cleaning foam that cleans and prevents dirt build-up with every flush. They actively stop limescale in its tracks, ensuring a sparkling toilet. The Bluewater Technology turns the toilet water blue, providing a visibly cleaner and fresher appearance. Enjoy long-lasting freshness as these blocks infuse your bathroom with a pleasant scent after every use. Simply drop one in the cistern for effortless, hands-free cleaning.