This does what it is advertised to do. It holds a sippy cup (or similarly short, narrow bottle) like a champ. The cup holder is very short, as the picture shows. I tried putting my life factory glass water bottle in and its way too tall. I can prop it up against the sun shade but have to keep catching it as it slowly pivots down. I would NEVER put a coffee cup in here, even a small one since the cup holder is way too mobile and pivots too easily. Not only would it make a mess of your stroller but it would pour coffee all over the kid in the jump seat. It is better than nothing since this stroller has zero storage (also something I knew when I bought it), but it could be improved by making it deeper.
Having previously purchased the Universal Bottle Holder - with absolutely NO success...I would STRONGLY recommend this Phil & Teds Buggy Cup Holder instead. I use this daily when walking my dog with either a 500ml water bottle or my reusable hot drink bottle (which I bought when out with buggy to fit the holder) or when walking in town etc. with a hot chocolate/coffee etc. I am yet to find a general drink it does not hold (obviously except bottles that are too large - wide based 750ml/Litre bottles) and would only say it means you have to buy 'slightly' smaller bottled water/reusable bottle to fit into it, because the Buddy Cup Holder is slightly smaller overall than the Universal Bottle Holder. I was worried bottles would fall out of the smaller holder, but so far so good (unless on very rough terrain - tree stumps etc...like to see any holder manage that) and my daughter is now 21 months.
The development of the was a step in the cup holder's development. Servers would attach a tray that hooked over the car's side window, which needed to be left up a little for it to attach to. This gave a temporary table to hold drinks and food while eating in the car. The drive-in restaurant and encouraged the development of built-in tray tables; often, the inside of the lid, when folded down, had indentations to hold cups and cans, and were found in cars as early as the 1957 . These were sufficient to hold beverages when the car was stopped, but not while in motion.