Excellent choiceThe water cup holder is made of high-end plastic, suitable for all kinds of bottles, water bottles, cans with an outer diameter of 2.6 - 3.1 inches, two combinations, it is a good helper for your outdoor sports. Easy to operateThe water cup holder can be easily installed and locked in different positions of the bicycle by adjusting the claws directly by the manual rotary handle, which is safe and reliable, and there is no need for screw holes on the bicycle. Special designThis cup holder is unique in design and easy to operate. By loosening the middle cross screw, you can easily choose the direction of the bottle holder according to your needs, making it more convenient for you to use. Wide useThis water bottle cup holder is not only suitable for placing kinds of water cups, water bottles, bottles, cans, etc, but also suitable for installation on various bicycles, mountain bikes, and trolleys.