The RAM:registered: Level Cup:tm: self-leveling drink holder is a great accessory for a wide variety of use cases. With two pivot points, the self-leveling feature allows your drink to stay upright – even in the most demanding environments. The integrated eyelet and hook provides an optional tethering function so you can secure any small or open container. The RAM:registered: Level Cup:tm: is compatible with cups, cans, bottles, and mugs ranging from 2.5" to 3.5" in diameter. Drink koozie included. **Replacement cost is $30.00