OK, folks, the price variance is huge!
Best two sources I found are:
$14.67 + shipping (he mentioned 5.95 but whether that was to my location or flat for that product I don't know)
Nova cup holder
$19.95 w/ free shipping IF you have PRIME
Be forewarned, it received poor reviews at Amazon, for a ridiculous reason, which prompted me to write my first ever, I believe, review pointing out (indirectly of course)the fallacy in the issue.
Mine has been on my rollator for 3 years, in the back of my car & although it feels a little flimsy, groceries, boxes of books, & luggage have been mindlessly dumped on top, with NO damage, nor has extreme heat in the parked car affected it.
My favorite cup holder is still my Think-King. I like drinks with ice in them, and it holds very large drinks. It's also great for holding my glasses, camera and car keys. http://www.think-king.com
Check out these photos of it in use! http://www.think-king.com/photos.html
B'racha's Nova Cup Holder
Elizabeth's Think-King Cup Holder