The amount of energy depends on how long the average cup would sit. A better critism might be complications in climates where water freezes. In any case, there

The amount of energy depends on how long the average cup would sit. A better critism might be complications in climates where water freezes. In any case, there is nothing so wrong with my comment that necessitates a negative attitude. I would not be surprised if it is an ‘idiotic’ form of hydro, or if it is not an idiotic form. But it’s clear that nobody has shown it to be one or the other as of yet, so your comment is negative with little justification.