Solar confusion

This is a neat concept — a solar water filter — brought to us by reader Zack Scott: But I’m confused. Does this work, say, if I’m lost in the woods and waterless? Does it filter out enough of the undesired elements to render water safe for drinking? Thoughts from Gristmillers?

This is a neat concept — a solar water filter — brought to us by reader Zack Scott:

But I’m confused. Does this work, say, if I’m lost in the woods and waterless? Does it filter out enough of the undesired elements to render water safe for drinking? Thoughts from Gristmillers?

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