Hydration on bike

How do you guys bring along fluids on your bike during a race? Water bottles on frame cages? Waterbottles behind the Seat? Water bottles located somewhere in the aero bars. Camelback type systems? Other Places?

What distance are you talking for?
For a sprint, i am going to run an “aerodrink” by the bars and go.

For a 1/2IM i will probably add the profile dual bottle holder that goes behind the seat as well as the aerodrink.

I would carry a camelback, but i wasnt a big fan of the way the straps fit on me last time i tried one on.

-Kevin