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I don't know where or when this idea originated any more than you do, but I saw 2 houses built with this idea over 20 years ago by I 10 in central Texas. Of course, glass was, and still is, a much more sensible material. BTW, bleach does NOT prevent algae, per se. it kills it . So when the chlorine is dissipated-aw heck the bottle will fall through first.