Bref Duo Cubes bring you a 2in1 formula(1) freshness and 2) cleaning power) that you can trust to help keep your toilet clean and fresh! Proof of action between flushes is the blue water remaining in your toilet between flushes! The unique Bref Duo-Cubes design releases active cleaning ingredients with every flush to help maintain a clean and deodorised toilet! Enjoy Blue Water action with Each flush, up to 800 flushes. Proof of action between flushes is the blue water remaining in your toilet between flushes! With its discreet unique design, it releases active cleaning ingredients with every flush to help maintain a clean and deodorised toilet! 2in1 Formula 1) Freshness 2) Cleaning Power Active cleaning ingredients