The RAP-365-18-429 consists of a triple Twist-Lock suction cup base, an 18″ PVC pipe and a universal cup holder for water bottles, insulated cups, tumblers and any 32oz containers. Ideal for standup paddleboards, the cup holder can function any a universal accessory container for holding your keys, phone, wallet and much more. Common Beverage Sizes: – 12oz Cans – Water Bottles – Insulated Cups – 32oz Containers (Nalgene, Pelican, Contingo, Hydro Flask)