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Sunlight-powered 'bulbs' made from plastic bottles light up homes | Ethical and green living | The Guardian
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Day and Night Time Lighting for Developing Communities: Hybrid Moser Bottles : 6 Steps - Instructables
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Kids Water Bottle with 3D Dinosaur LED Light - 14 OZ Tritan BPA Free - Creative Ideal Travel Cup Dinosaur Gift for School Kid Boy Child Holiday Camping Picnic : Amazon.co.uk: Sports
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