Boat cup holder made of ABS plastic. The cup holder features anti-slip rubber grips for strong hold and secure mounting on boat rails. A 360-degree adjustable knob ensures the cup holder remains stable and secure on the rail. Holds drinks securely, helping prevent spills. Easy to install—simply clamp on without tools, drilling, or assembly, ensuring no damage to the boat. Compatible with aluminum rails, poles, and bimini top rails. This boat drink holder is durable, practical, and designed for convenience. The large caliber cup holder accommodates various bottle and cup sizes. Adjustable clamp allows 360-degree rotation, making it suitable for horizontal, slanted, or vertical poles, enabling flexible mounting at different angles. Anti-slip rubber lining keeps bottles secure and prevents slipping. Ideal for use on pontoon boats, bass boats, jon boats, jet skis, yachts, kayaks, and more. Holds water bottles, coffee cups, soda cans, beer cans, and other beverage containers. Easily mounts to existing rails and can be moved to different locations as needed. Universal design with ample interior space for storing small items such as sunscreen, pliers, drinks, wipes, lures, and other accessories. Color: Black. Material: ABS. Package contents: 2 x cup holders or 1 x cup holder (other items not included). Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.