It's made of stainless steel and is bpa-free, plus it comes in tons of other colors. Because of the way the bottle is insulated it keeps water hot or cold for hours.
I keep this water bottle on my desk all day and usually still have ice in the bottle when I go home. Plus it's great to always have ice cold water when I'm working out.
If you don't like the steel mouth, Hydro Flask also has a number of different lid options. I prefer the straw lid, but they also have a flip lid available. Other companies also sell compatible lids.
