Upgrade Car Cup Holder - Adjustable support arms for various sized drinks (cups, cans, bottles, glasses, etc.) max. diameter 3-15/16 inches (100mm) (2 foldable car cup holders with mounting hardware) Compact and foldable design - The foldable design protrudes only 1 inch when closed, saving space when not in use. It's super convenient and corrosion-resistant for storing your drinks. Versatile - The Spurtar adjustable cup holder is easy to mount using the included screws. The portable cup holder can be attached to any flat, vertical surface; With this wall-mounted cup holder, you can attach it to the wall next to the sofa, beside your bed, or anywhere in your home, car, or gym, offering added convenience in your daily life, whether commuting or traveling. Corrosion Resistant for Marine Environments - This adjustable car cup holder, also known as a boat cup holder, is made of durable, UV-stabilized ABS plastic and stainless steel hardware to prevent corrosion in marine environments, on