【Practical and Protective】: This is a must-have tool in the car or boat, it will help you fix the cup and avoid the trouble of finding the location of the water cup. In addition, in order to avoid the liquid of the cup or water bottle from spilling or staining the car, the holder can be used to prevent it from falling or shaking. 【Foldable Design】: This product only protrudes 1 inch after folding. Therefore, when you don't need to use the water cup holder, you can flip the ring of the holder down and close the lid, which makes it easy to store and save a lot of space. 【High-quality Material】: Made of anti-deformation and impact-resistant ABS material, it has excellent heat resistance and waterproof performance. It is completely durable in the marine environment, and there is no need to worry about damaging the product even if you go out on a boat or cruise. 【Easy to Use】: The package comes with 4 stainless steel screws, which can easily install the cup holder to the target position. When you want to fix the water bottle, just put the bottom of the bottle face down into the ring to fix it on the cup holder. 【Wide Application】 The cup holder can be easily adjusted to accommodate almost any cup, mug, bottle or can with a diameter less than 2.56 inches. It can be fixed on any flat surface, such as car cab, yacht, RV, home, office, workplace, etc.