Instead of buying bottled water why don't you buy an Ohyo and fill it up at home? You just have to refill your Ohyo from the tap just twice and Ohyo becomes carbon neutral. And once you've drunk the contents it collapses right down so that it can be easily slipped into your pocket or bag!
These sunglasses are great! Not only do they look amazing but all the profits of selling these glasses goes to helping people in poverty stricken parts of South Africa. So by looking good your doing good! What's not to like :-)