Disclosure:  I received these items for gift guide inclusion.  All thoughts and opinions are my own.     I'd say the Hydro Flask has become the most popular water bottle in Hawaii within the last year.  It's amazing how many people here own them.  In fact, our local surf shops seem to sell out soon after they get their shipment in.  If a water bottle is that popular, there must be a reason, right? I received two Hydro Flask Bottles, a 32 oz. and a 40 oz to try out.  I just had to see what all the hype is about.  Are they really as great as everyone says?  After testing Keep reading...