Video from: www.youtube.com
After a long day of web surfing and all, I found this video. The video is about the so-called Solar Bottle Bulb. It is done by putting the purified water inside the water mixed with bleach. It is then attached into a galvanized iron sheet using a rubber sealant. It is very practical to use inside homes not reached by electricity. The bottle is promoted by isanglitrongliwanag.org, a lighting project of MyShelter Foundation in the Philippines. You can visit the website for more details. This is definitely a good to recycle those PET bottles.
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