Anyone seen "Thirsty Planet Water". It turned up in our health food shop recently. 50¢ for 500 ml (most bottled water here is €1.25 or so) and donates 5¢ per bottle towards buying a water pump for an african village. Probable cost €250.

I thought the cost of the bottle was insightful enough, and the donation on top makes any other brand of water pretty much unthinkble.