【Anti-slip design】Equipped with EVA anti-slip pads, reducing shaking and collisions and avoiding scratches on the cup body. 【Automatic adjustment】When the water bottle is placed, the cup holder will automatically tighten, and it will be automatically released when it is picked up. 【Easy to install】The installation is simple, no need to use any tools. The car air vent cup holder makes it very easy to insert and remove your cup with one hand. The cup holder can also be used to store small items. 【Suitable for】The car air vent cup holder is suitable for most vehicles. As long as your car's ventilation fan blades are designed horizontally, you can use this practical cup holder. Suitable for diameters less than 7.5 cm.