This is the most awesome water bottle that I own! It has a freeze stick combined with a filter, so when you drink through the straw in the middle, you get cool filtered water!!! It also has a counter ring at the top so I can keep track of my water intake.
I got the 32 oz bottle, but because of the displacement of the freezer stick/filter, it actually holds only three cups at at time. Not a big deal, just good to know!