“This brush has let me stop trying to find solutions for *so* many of my bottles (a certain fizzy!streaming soda maker, for example) that have necks just small enough to deny most of my long-handled brushes. It's a great lil guy, and the shape also makes it unexpectedly Able-friendly. An up-down motion is enough to clean most things, and a flat circular motion does the bottom - almost every other brush involves single-facing bristles needing both circular motions and often sidewards pressure when cleaning, which is difficult with a nerve-damage condition I have. Even if I never bought another WD product (unlikely), I'll probably be buying these brushes for as long as they exist.”