Bike drinking systems

Bike drink systems Currently I have two water bottles cages on my triathlon (or time trial) bike. They are standard mounting locations within the frame as on a standard road bike.  I have been wanting to upgrade to a type of drinking system I have seen others use in tri/TT. Not sure what is best for me and I may have to experiment.  More aero or to be a cohesive overall system for speed. A mix of approaches may be best.  So I bought an aero drink system for my triathlon/TT bike. It is made by Vision Tech division of FSA, the same make as my aerobars.  The mounting is on the underside of my aero bar extensions. This is a "cockpit" mounted system. It has two separate bladders and combined can reportedly hold one liter (33 oz). There are tubes that sticks up to drink from like a straw with bite valves. One for each fluid actually.  Although it adds some weight, it seems negligible on a long flat course. Keeping aerodynamic tuck is the key and having the fluid constantly "staring at you" keeps you most likely to succeed at nutrition / hydration.   Profile Design, Torhans and others make aerobottles that I have seen many riders use. The PD has a yellow sponge mesh in it that I always think "how do they wash that?" or "yuk-drinking out of a sponge".  It seems simpler and reliable.  Anyhow, it holds a lot and is up front at your mouth. Big opening for "on the go" refill. Not sure how to quickly the refill while riding would be. It may take too long.  Another approach in this area are to just mount a standard water bottle horizontally between the extensions. That would require getting out of the aero tuck to drink from. A variation of this takes a standard bottle and adds a tube (Speedfil).  Speedfil makes a system with a special big aero bottle using the downtube cage mounting holes. It has tubing that goes up to the cockpit.  There are systems that put two standard water bottles behind the riders butt. It helps fill in the dead air zone and supposedly make the rider even more aerodynamic. That was the direction I was going to go with  and maybe I will in the future. Anyhow X-Lab is one company that makes good systems that top pro triathletes use. They even integrate the spare tire tube and inflator equipment into some models.  Not sure if I would also use one (the downtube cage only) or both frame mount cages. It depends on the race distance. The Vision system holds say 32 oz plus two bottles of 24 oz each adds up 80 oz total.  I know the Vision system would have saved me a minute or two in B2B as I refilled my water bottles out of their bottles. I stopped and got drinks. Perhaps I could just grab and go now. I need to research or rethink this more. Did i refill my bottles from a 5 gallon jug with a spout at the bottom? Not stopping is the goal.  Envision the jet-fighters refueling in mid air. If only I could have someone in a car fill up my containers. Yes they could just hand me new bottles.  I know I took 10 minutes at least at that one stop (hypothermia) at B2B. Way too long. There were other delays but part of it was time spent filing my bottles.  I got the Vision drink system for 80% off which made it an easy choice. I love a bargain.   Now if I could only get 80% off the entry fees of these races.