What a good faith reply. If you sincerely believe this, that's a good insight into how dumb the masses are. Although I would expect a higher quality of reply on HN.

You found the most expensive 8pck of water on Walmart. Anyone can put a listing on Walmart, its the same model as Amazon. There's also a listing right below for bottles twice the size, and a 32 pack for a dollar less.

It cost $0.001 per gallon out of your tap, and you know this..