Whats the point of even having a carbon fiber bidon cage if its just going to be used to hold a plastic water bottle, are they actually worth the money or is it just a marketing gimmick, are the weight savings and aerodynamic improvements really noticeable or are people just installing them because they think it makes their bike look more pro, should you be looking for specific features like integrated bottle retention systems or is it just a case of the most expensive one being the best, can anyone actually recommend a carbon fiber bidon cage thats worth the investment or should we all just stick to the tried and true aluminum cages, and are there any real world benchmarks or tests that have been done to compare the performance of different carbon fiber bidon cages or is it all just anecdotal evidence and hearsay.