Space Saving Design: The dual car cup holder is equipped with 2 storage cups, small in size and large in capacity, for the purpose of saving car space, and can hold two drinks at the same time.(Fits 2.1-2.8 diameter bottles) Shake-proof Grip Design: The car cup adapters 4 adjustable elastic clamps can firmly fix the water cup while driving, like a 4-finger grip and tightening operation. It can effectively prevent water cup shaking and noise. Detachable Mounting Base: The base of the cup holder expander can be moved from left to right. The position can be shifted and adjusted according to the space of the car body, which provides the most comfortable place for you to reach your drink. Easy to Install: Simply rotate the top of the adapter to extend or retract the base. The diameter of the inserted base can be expanded from 2.6-3.7 to fit many different car cup holders and vehicles. Depending on your purpose, the 2-in-1 cup holder also can be installed on the center armrest or on the dashboard with two pieces of double-sided tape. Premium ABS Material: The cup holder for car is made of premium ABS material, which is flexible, durable and washable. Also heat-resistant and is not easy to melt to protect your beloved car.