This cup holder is actually very impressive the plastic used it very sturdy and strong it is not flimsy at all. I put my water bottle on it and it holds it nice and tight it's definitely more than what I expected. It is very easy to install and the clamp holds on there very nicely except that if your using on a bike like I am well after a few bumps it tends to slowly loosen and the cup holder will start to slide down but if your using it on a wheelchair or walker something thats not moving too fast then it will be just fine and wont move.