Here's an idea that is worth promoting. Landscape architect AREA has come up with a proposal called London Tap, a network of freely available drinking water around the capital. The idea is that it would remove the need for carrying/ buying all those expensive and non eco-friendly plastic bottles of water.
Free drinking water is not of course a new idea. Parks traditionally have drinking fountains, and there were free supplies of water within the Olympic Park as visitors had to pass through airport-type security and ditch their own supplies. Similarly airports are increasingly supplying water stations on the airside of security although some of them are laughably difficult to use - which probably delights the retailers.
AREA has come up with an idea that looks elegant although a little short on detail, and suggests an appropriate first location would be in the new Meridian Square outside Stratford station.
It is hoping that Boris will take up the idea - and it is certainly appealing. Maybe a water fountain by every Boris bike stand?