I remember how pleased I was when I bought this on impulse (or was I able to use up some Geek Points on it?) and discovered that it's just short enough to tuck into my current purse, does not leak (unlike every other water bottle I've had), and the cobalt blue looks great with the turquoise purse. I can't open it one-handed but since I also have a water bottle that lives in my car that I can just flip up the straw from, that's been a non-issue thus far. A pity the TARDIS design is abrading away from riding around in my purse -- still, it's a good color.