Universal adjustable base that fits most standard round car cup holders. Expands to fit cup holder diameters from 66 mm to 100 mm. Install by twisting the and bottom in opposite directions to lock it firmly in place. Extrawide drink holder with a Ushaped side opening to accommodate oversized tumblers, large water bottles, and handled mugs. Keeps tall or awkward containers upright and easy to retrieve. Builtin slim slot for phone and flat items. The integrated 2in1 organizer holds a smartphone in portrait orientation and also secures cards, keys, or coins, keeping your console area clutter. Stable, rattle performance for smoother drives. A nonslip base pad and rubber grips hold the expander steady to reduce movement, noise, and the risk of spills on bumpy roads. Simple, reliable design that solves common incar storage problems: expands to fit different cup holder sizes, accepts larger drinkware that wouldn't normally fit, and provides quick access to your phone and small essentials. Use scenarios: Daily commute: Keep your coffee or travel mug stable while your phone stays accessible for navigation or calls. Road trips and errands: Fit a large water bottle or handled mug and store extra items like toll cards or loose change in the slim slot. Rideshare or family driving: Quickly adapt cup holders for different passengers' drink sizes and reduce rattling or spills for a quieter, safer ride. Compatible, easy to install, and designed to keep drinks and small items organized and secure while driving.