So is a water bottle a water bottle? I have been running with a Camelbak and/or Platypus water bladder for at least 12 years and recently I started running with a handheld bottle. It is not as comfortable, but I seem to drink more with a handheld. Also, I expend much more effort drinking through that tiny tube from a bladder and I drink less.
Honestly, I never gave it any thought, always assumed they were all the same, but it is not the case. I don’t remember where or even when, but some how I was given a Camelbak water bottle. I think it was a freebee or something. Now, I have been using both an Ultimate Direction and a Nathan for at least 4 years and they have always done the job.
The nozzle for the Camelbak bottle is super efficient. With just a slight squeeze, it fills my mouth and then instantly sucks in air allowing you to take another drink fast. Without sounding like a commercial, it really makes a difference. And it is cheaper than the other running bottles.
*With all that said, I am intrigued by the new Geigerrig pressurized hydration pack. It seems a bit heavier, but I have heard you can actually spray water into your mouth vs. sucking. Looks like you can also buy a filter setup for back country or self sufficient races.