It's not bad as a bottle cage, if you don't expect much. Like a lot of people have said, it doesn't expand much at all beyond standard, but it does collapse if you want to use a store-bought 0.5L water bottle on your ride...
This was for my daughters bike as she likes to take a variety of ore-packaged drinks with her for her daily school commite. Easily adjustable to fit many sizes of common pre-packaged drinks as well as traditional water bottles. Not for me, but daughter loves the flexability it offers.
I bought this cage because it�s adjustable for different bottle diameters. It�s well made and works as described. However, my standard, reusable bottle didn�t fit even when the cage was adjusted to the max. Narrow, recyclable bottles, i.e., Poland Spring, Dasani, etc., will fit perfectly, and you can adjust the cage for a secure fit. It just depends on what type of water bottles you prefer...