Although I do not recommend trying this one, it's pretty amazing.  I love water, and I mostly drink it in bottles, but I don't do it this fast.   I figured out how to do this, but I am too scared of drowning to try it!  First off you need one of those new eco friendly bottles.  You know the ones that are very crunchable.  You are supposed to inhale as you drink and basicly vaccume the water down in to your stomach.  Sounds to me like you could just as easily get it into your lungs and drown.  But it's apparently a thing.  This is about the 3rd video I saw of this online today.  Enjoy lightning fast hydration at your own risk.