theory - when you bike the fluid in your bottles sloshes back and forth. each time the fluids (about 700 grams per bottle) moves back and forth it has to gain momentum from somewhere which has to be, I assume, translated from pedalling power. Just like rocking your bike back and forth costs energy.
invention - a 3d hash tag shape insert for bottles - flexible so you can put it into your bottle , and its most of the vertical height of any bottle and expands to the perimeter shape. exact fit doesnt matter, because you just want to compartmentalise the fluid mass so that not all of it has to all the way back and all the way forward - basically a wave breaker inside your bottle
results - faster bike splits, or fresher legs after biking, better bike handling in corners, no momentum lag when you sprint or accelerate and wait for the fluid to rebound and catch up inside the bottles
so the top of it could look something like this....but the depth would be the height of a bottle that you can cut off to customise
is the theory right? how much savings could there from not pedalling water to the front of the bottle for 5 hours?