I am just wondering what effect standard "round" water bottles have on the aerodynamics of the bike. I would think that it would specifically affect TT bikes. With the hundreds of thousands of dollars of R & D that go into making "aero" frames and wheels, why doesn't anyone create or use an "aero" bottle(s)? Do they not nullify the aerodynamic effects of a faired downtube? Just wondering. I have no evidence whatsoever. Do you?