Multiple choice general knowledge Which is Rechkitt and Colman's most well-known toilet cleaner brand? Harpic Odonil Lizol None of these Reveal answer Fill a bubble to check yourself A Correct answer Explanation Harpic is Reckitt Benckiser's (formerly Reckitt & Colman) most well-known toilet cleaner brand globally. Odonil is an air freshener, Lizol is a floor cleaner, both also RB products but not toilet cleaners.