What is the lowest price of pure water in Chongqing?

Generally the price of pure water will be lower than mineral water, but sometimes the price is abnormally low, then you have to keep an eye out, because before I ordered a bucket of water in the street small water store, an open out of an unpleasant smell, but also greedy cheap to buy, to learn a lesson, and then changed the "even you order water" and then did not appear in this case, the quality! Can be said to be great.