|Click here to watch the best design of  2011: a 55-60 Watt light bulb, made out of a soda bottle, just filled with tap water and a little bit of bleach (against algae). At this moment the $1 light is being placed at the roofs of about 1,000,000 simple shacks at the Philippines. The light bulb works for about 5 years. Such a good thinking! Design Students from the Massachusetts School of Technology Via Bas