MC5316WSeaSucker Universal 1-Cup Holder, White Model: MC5316W The incredible variety in beverage-holding vessels (tumblers, insulated tumblers, cans, bottles, plastic cups, paper cups, etc.) these days wasn't enough to stump our design team on this one. The Universal 1-Cup Holder has the range to hold just about everything thanks to its 4" opening. This cup holder uses a set of rubber flaps in the opening to keep your drink from flopping around, and they provide just enough friction to keep your drink