Pretty sure I've seen branded bottled water given out as a promotional tool at trade shows and other events. The jump here is to the whole of London, specifical

Pretty sure I've seen branded bottled water given out as a promotional tool at trade shows and other events. The jump here is to the whole of London, specifically people using a form of transport that's hot and stuffy during a time of year that's hot and stuffy. Genius. Would love to see some of the stats they gather on the ads - must be quite a challenge tracking eyeballs, etc...