ANTI VIBRATION - The cup holder has four claw-like fingers to hold your bottle/cup/can while driving. AND it doesn't make any noise?' collision or shaking in the car. EXTENDABLE BASE - Simply twist the base to extend or retract it to hold the carrier cup securely. The base can extend from 2.6" to 9.5cm, which fits all sizes of existing cup holders. REMOVABLE BASE - The position of the bottle holder base is removable, you can install it anywhere. left or right according to your need, or you can even install it without the base on the dashboard by the adhesive. 2-IN-1 DESIGN - 2 glass bottle holders are the best accessories for your car storage, one cup holder for your coffee/drink/can, another also for coins, smartphone and keys etc. SOLID - Made of high quality ABS plastic, the cup holder is stable and easy to remove. to clean. The cup holder fits most bottles with a diameter of less than 7 cm.