Another bump + for Arundel cages.
I've had a set of Dave-O on my bike for 5 years and they've worked flawlessly sense day one. I've yet to have a bottle pop out even when getting smacked by a car or pop out after other bike related mishaps.
They even make a non carbon cage the Arundel Sport which is just a good as their carbon Dave-Os. made out of nylon-reinforced plastic. I have a set of these on my commute bike.