I remember about three years ago when I bought my first one (the Blu *cringes*) and it was the size of a normal cigarette. I was at a party this past weekend, and two of my friends had some that were about the size of a 2D cell Maglite!
It gave off huge amounts of vapor, but the first thought that came to mind was "Holy crap."
I'm curious as to why they are getting to that size. Is it better battery life or something?

I'm curious as to why they are getting to that size. Is it better battery life or something?