I live in Florida, It's hot most of the year; Hydration is a must and this system really helps make it easy to access your favorite liquid while you are moving.   I bought the mounting bracket that lets you mount the bottle between your aero bars.  Without the bracket you will be mounting the bottle to your bars with large rubberbands.  The rubber bands may work however the bracket makes the set up a lot more solid.  The only thing that makes me give this a 4 star rating is the cap.   It is designed for someone to refill on the go; the only problem is leakage.  Forget about the yellow pad it does'nt work.  I had Gatoraid all over my bike the first couple of rides untill I modified the cap by adding a round disk I cut from a old food storage container.