I wonder if anyone else has thought of this product, but I think the Karim Rashid 'Bobble' is exactly what the doctor ordered. As one who hates drinking bottled water (it's the taste, not even the fact that it's not environmentally-friendly), this is a perfect alternative.
Essentially working like a Brita container, the Karim Rashid 'Bobble' takes this theme and makes it portable--and pretty. What a great way to encourage more people to drink tap water! I would definitely use it--but I also prefer tap water already.