Expandable car cup holder and organizer that fits most standard round cup holders (base diameter 66–100 mm). Designed to hold large drinkware and store a slim phone or other flat items while reducing rattle and spills. Key benefits Secure fit: Twist the and bottom in opposite directions to expand the base and lock it into place. The adjustable base creates a stable foundation that fits cup holder bases from 66–100 mm. Holds large containers: Extrawide opening and a Ushaped side cutout accommodate extralarge tumblers, big water bottles, and handled mugs that won't fit standard holders. Keeps essentials within reach: Builtin slim slot holds a smartphone and also secures flat items such as cards, keys, or coins to keep your console organized. Stable, quiet performance: Nonslip base pad and rubber grips hold drinks upright and reduce movement and noise on rough roads to help prevent spills. Function, compatibility, size, material, performance Compatibility: Fits most standard round car cup holders with base diameters between 66 and 100 mm. Size/function: Expanding base for secure fit; extrawide cup area with Ushaped side opening for tall or handled drinkware; slim storage slot for phone and flat items. Materials/performance details: Nonslip base pad and secure rubber grips for stability and rattle reduction; sturdy construction to keep items steady on bumpy roads. How to install Place the holder in your vehicle's cup holder, then twist the and bottom in opposite directions until the expander locks firmly in place. Practical use scenarios Daily commute: Securely hold your morning coffee and slip your phone into the slim slot for hands access at stoplights. Road trips or gym runs: Use the extrawide opening for large water bottles or insulated tumblers; store cards or keys in the slot for quick access. Driving with handled mugs: The Ushaped side opening accepts mugs with handles that would otherwise not fit standard cup holders, reducing the risk of tipping on uneven roads. What this solves Eliminates loose or rattling drinks by providing a , secure fit. Accommodates larger or handled drinkware that won't fit standard holders. Reduces clutter and keeps small essentials accessible and protected from spills. Designed for reliable, everyday use without complicated installation or frequent adjustments.