If you're reading the reviews, you're on the right trail - but as far as cool trail items go, this falls short.
I bought two for my wife and I to put coffee in and head to work (35 minute commute). Due to poor engineering, you can't drink out of the bottle for 30-40 minutes (of which the liquids are hot!) and then once the rim has cooled down, so have your liquids. Overall, this is really not any better than our plastic coffee cups in terms of insulation effectiveness.
Bottom line - not horrible, but I can't recommend it
+ keeps liquids hot for a time
+ looks cool
- can't drink straight from bottle (haven't bought sport lid yet)
- neoprene-like lining on bottle cap is beginning to come up after a month, compromising water tightness
- doesn't really outperform any other coffee cup