RAM Part RAM-B-132-1RU : This is a complete drink holder kit that easily mounts to motorcycle handlebars.  

We received a few inquiries for a mount like this, and after some careful investigation have uncovered a great new mount for your drink from our buddies at RAM Mounts.

Made with powder coated marine grade aluminum, the mount fits handlebars from .75 to 1 inch in diameter.  The cup holder is hinged at 2 points to permit a level fit regardless of the mounting angle.