I picked up a Fabric cageless bottle, which seemed like an elegant solution for my Kona Process 134's bottle mount on the underside of the downtube.
Halfway down my first lap with it, on Bobsled, the bottle came off, I ran it over, and it exploded.
I know; cool story, bro. But there's not much information out there on these, and I wanted to warn others with a bottle mount under the frame that this product may not work for you.
It may work better for bottle mounts inside the front triangle. Your mileage may vary.
Edit: I emailed Fabric with pics and details of what happened. They responded quickly and are sending a new bottle with studs of a softer plastic said to better absorb vibrations. I look forward to trying it out. Read below.