My back seat has no cupholders. I installed two. They can be mounted using the included foam tape and ,or screwed in place. I decided to do both.
These are by Fischer.
This cup holder started off as a Genuine factory option for the Luxury Mercedes Benz E300 4Matic wagon, Specifically for the rear 3rd seat passengers. Later on GM put it in the Sporty retro Chevy SSR...high quality German made cup holders
I bought two on ebay from
scottlandyardspares
Two cost me $31.32 shipped.
This is the current ebay auction
I did look at literally hundreds of options. Some looked weak. The Corvette cup holders that mount to the side of the transmission tunnel looked pretty good, but they were expensive. I considered a center console for the rear seat. One from a Jeep looked like it might be an option. It too was expensive and I did not want to lose the room.
I considered mounting in the rear of the front console, or one of the front seats. I worry about them getting stepped on or broken there.
There were lots of cheaper cup holders. These just looked to be of the quality I want and fit nicely on the rear door panels.
They are sturdy and have held up well. You would never know that they were not factory equipment.