Not too long ago we made a post about 8 cool ways to re-use plastic bottles. Well now we give you one more way; an air conditioner! Yes that's right, you can make an eco-friendly air conditioner that uses no electricity, just air flow and plastic bottles. The idea started with Ashis Paul in rural Bangladesh. In many of these areas people live in tin huts, and in the summer it gets extremely hot. Since February, they have successfully installed these eco-friendly air conditioners in about 25,000 households. Learn more about the Eco-cooler created by Ashis Paul in the video below!