The milk bottle social experiment

I literally stumbled across this amazing milk bottles on a recent web trawling day (my life seems to consist of a lot of them at the moment!) I was bowled over by the detailed intricacy of them. They also have a great story behind them. Apparently unsuspecting residents in the West Midlands in the UK started to find these etched bottles on their doorsteps in return for the plain ones they left out the night before. The artist in question, Charlotte Hughes Martin, says "I like to think I'm cheering up people's days." I love her sentiment as much as the milk bottles.