Deep Blue Marine Double Drink Holder. Need a drink holder that mounts on vertical or horizontal surface? This drink holder is designed with that versatility in mind. Constructed of marine-grade polymer this drink holder fits cans and bottles in Coozie type insulators- handled mugs- bottled water of many types and sizes- will also accommodate most binoculars. Pre-drilled on back and bottom for four 2 suction cups (included) for side or surface mount. May also be permanently attached.