I would not like to be seen with my mouth on the end of that flask, considering it's shape........
Shangas,
I've looking at a few flasks as well (not for water carrying however) and would be interested in seeing what you decided on. To add more fuel to the fire, a co-worker brings one of these to work for his coffee. It's 12 oz. and looks pretty sleek. Not too retro but looks rugged just the same.
Ernest
http://cookwarex.com/product_info.php?cPath=17&products_id=157