Your assignment (should you choose to accept it) is to find the best cup holder out there for our TravelScoots. If you do a google search for "Microphone stand cup holder", "bicycle cup holder" or "wheelchair cup holder" you'll see many options.I don't think attaching a cup holder to the handlebars is going to be an option, which makes me think the microphone stand cup holder might work best, since it can be attached to a vertical piece. My sister Rae is the one who came up with this idea.
Here's one product that might work. Look at the SwirlyGig II.
http://www.swirlygig.com/htm/products.htm
Has anyone found other accessories that work with the TravelScoot?