The cup holder (under the passenger's left leg) is just too awkward. I looked for another solution and found it at www.griotsgarage.com (search for cup holder); it's $17 + shipping. It glides open with an easy one-hand touch. It automatically adjusts to fit and secure many types of cups, glasses and bottles. It holds cups from 2 1/4" to 3 1/4" in diameter. It's the same cup holder used in several Mercedes models including the 500SL. When closed it measures 4 3/4"l x 4"w x 1 1/2"h. You can mount it to the left door in front of the handle. Height is a consideration: early model owners might not like this location when using their touch screen; too high interferes with A/C air flow. New Roadster owners might wait until they master getting out of the car--wouldn't want you to kick it inadvertently.