FOLDABLE DESIGN: This plastic boat cup holder has a foldable design, which can help you save space. You can fold it up when you are not using it, and open it up when you need it. It is very convenient for you to use and store your cups. ADJUSTABLE DESIGN: The opening of this cup holder is adjustable, the diameter of the max opening is 2.6in. It can hold different sizes of cups to meet your need, such as cups, cans, bottles, etc. PREMIUM MATERIAL: Our adjustable cup holder is made of high-quality ABS plastic material, which is solid and waterproof. It is not easy to break or deform and is long-lasting. With a simple style design, this car cup holder can fit your car interior. EASY TO INSTALL: Coming with stainless screws, the car cup drink holders can be easily installed on any flat vertical surface of your car. There are 4pcs adjustable drink holders in the package in total, you can mount them on your car door or home wall as you need. APPLICATION: These cup holders are widely used for the car, boat, truck, RV, yacht, home, office, kitchen, wheelchair, trolley, wall, table, chair back, etc. Attach a drink holder to your car, and you don't need to worry about the drinks spilling. It will keep your vehicle inside clean and tidy when driving, and provide more convenience in your daily life.