1. Quadruple Cleaning Mode: 4 cleaning modes for comprehensive and efficient removal of different stains. The right angle ball brush head cleans stains attached to the cup wall and bottom. The gap bristles brush removes hidden dirt from narrow grooves, especially ideal for baby bottle nipples. The U shaped soft rim brush tackles stubborn stains around the cup rim. The hard bristle corner brush cleans dirt from container corners and grooves. 2. Right Angle Brush Head Design: The unique right angle brush head effectively removes stubborn stains from hard to reach areas (corners and sides). Suitable for cleaning baby bottles, sports bottles, beer bottles, wine tumblers, tall cups, vacuum mugs, travel bottles, beer growlers, vases, or coffee pots. 3. Retractable Long Handle: The retractable handle of the cup brush provides added convenience, allowing deeper access into bottles and glasses. The non retractable handle length is 11 inches, while the extended handle reaches 13 inches. 4. Convenient Storage: This bottle brush set is easy to store in a kitchen caddy or hang from a hook thanks to the hanging hole on the brush tail. The set is dishwasher safe for occasional cleaning convenience.