The first step for making solar lanterns is collecting the right materials. Used plastic bottles are cleaned well to remove any residuals. Solar panels, LED lights, and rechargeable batteries are key ...

Engineer Guy Bill Hammack explained the ingenious design behind a recyclable two liter PET plastic soda bottle.

The vessel's twin hulls will be filled with 12,000 to 16,000 bottles. Skin-like panels made from recycled PET, a woven plastic fabric, will cover the hulls and a watertight cabin, which sleeps four.

The second step is to build solar night lights by adding a micro solar panel in the plastic bottle. All the parts used are locally available to the community. The project started in the ...