I’ve never wanted to attach a water bottle cage to my bike; I like it to be as free of clutter as possible, both for aesthetics and to keep the weight low. But I can’t say that I’ve never wanted to have a quick drink handily accessible when I’m riding without a bag.
That’s where this bottle cap clip concept by Matthias Ries comes in.
It couldn’t be simpler–just screw it on to your Poland Spring bottle (assuming there is something resembling a universal standard for bottle cap size and threading, I suppose), and clip it on your bike. When you’re done drinking, the clip goes back into your pocket or wherever you might want to store it. No screw-on cage in sight. I like it.