Profile AquaCell Bottle / Hydration Q, etc.

http://www.profile-design.com/products/hydration/aerodrink-bracket/

I use the bracket referenced in the link above (only have the single cell bottle, but the same bracket appears to fit both bottles).  Even so, it sometimes works its way a little loose if the ride is bumpy, so I do the trick with the two fat "rubber bands" that came with the bottle and that seems to keep it in place nicely.  There's a velcro strap that comes with the bracket, but I found that to be completely useless as it works it's way out of the holder after the first bump you hit.

I purchased the same aqua cell for my Cervelo and also bought the bracket.  I can not get the aqua cell in and out of the bracket...there is not enough clearance.  I too use the fat rubberbands to fasten it to my aero bars.

In my last olympic dist I only filled the aqua cell and it seemed to be enough fluids for me.  It holds quite a bit but depending on the temp at race time you may want more.

Good luck!

You have a 44-oz. aerobottle and are looking to install a two-bottle rear-seat mount? Are you doing an Olympic or going on three-day maneuvers in the desert?

 I should have clarified ....I meant I would use one or the other.  Heh heh.  I had heard someone comment the two cell bottle made their bars feel "top heavy" 

I know never try something new in a race but due to circumstances, this is a "going thru the motions" event.  I'm well enough trained but the spirit's a bit lacking .....