It is sturdy and the best in this aspect, but it can only fit a relatively large paper take-away cup, none of the small thermoses fit

Very good for its price. It will probably be useless for a bottle of water or something else in this shape. Wearing a helmet, I don't think anyone would want to drink coffee and need the immediacy of such a cup holder, unless they don't have a bag with them.

Sturdy construction and durable. Adjustable in terms of diameter with absorbent material (foam) leaves around the perimeter to embrace the glass/bottle you will place without "hurting" it or causing noise. It comes with the appropriate set of screws for its installation, mainly on the mirror pole. Despite its exposure to various environmental conditions (humidity, rain, winter, etc.), it has not shown signs of oxidation, at least for its metallic parts. There was a problem initially regarding the metallic mounting arm on the mirror. In my case, the following problem occurred: after a few kilometers, due to the vibrations and adjustments of the motorcycle (small motorcycle, scooter) caused by the irregularities of the road surface, the screw holding the cup holder mounting arm on the mirror would loosen, and the cup holder would "play". This issue was resolved with a safety lock. Since then, everything is fine. Chinese product.

I use it daily and I have no complaints!
Normal wear over time.
Personally, I use it for hot drinks, etc. and I have no issues!!!

You get what you pay for. This case is for short distances, around 3-4 kilometers, and with caution, as it shakes a lot