The VersaChocks exclusive interchangeable accessory holder (patent pending) enables the swift and effortless removal of a wide variety of accessories without requiring any tools. Just install the channel mount using the two screws provided and insert the accessory of your choice. The drink holder series is specifically designed to accommodate mugs with handles, beverages, and standard wine bottles (3.75" inside diameter). Constructed from HDPE and featuring 316 stainless steel hardware.