The SAFE sticker is a UV purification label that works by simply sticking it on a bottle of contaminated water, putting the container in the sun and waiting for the UV light to kill harmful bacteria, viruses and microorganisms.

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newinsightfulfun

[–]SoCo 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

I was hoping the stickers were going to be some kind of hologram that reflected light more-so in a UV range, but this seems more cheap and economic.

I do worry how much UV is absorbed by those plastic bottles though. They add UV stabilizers to the plastic, to prevent them from degrading quickly in the sun. I'm not sure if that equates to passing less UV through, but it would be a first concern. The increase in plastic chemicals leaches in the water, when exposed to UV and sunlight would probably be my next concern.