JJ DUO Flex Lite Toilet Brush Grey Co Op Superstores Flex Toilet BrushGrey White Grey White Flex Lite Steel Toilet Brush White BrandAlley Joseph Joseph Flex Lite Toilet Brush with Holder Grey White Joseph Joseph Flex Toilet Brush Grey Howards Storage World. Conventional toilet brushes hold dirt and liquid, making them messy and unhygienic to use and clean. Also their bristles can distort and wear, meaning they need to be replaced regularly. Flex is a revolutionary toilet brush designed to solve all these problems.