That is the view of Benjamin Edgar who has founded a company that endevours to make water packaging more sustainable. Boxed Water is Better uses recyclable carton packaging instead of the standard plastic bottle. According to the company's website they are "part sustainable water company, part art project, part philanthropic project, and completely curious."
The packaging is made up of a very green 90% of recycled materials, and in terms of transportation, about 5% of a truckload of boxes would require about 5 truckloads of empty plastic or glass bottles!
To me it sounds like a brilliantly simple, genuinely sustainable idea and who knows, we could all be drinking water from boxes in the not too distant future.