Milk is now cheaper than water in the UK By: CNBC.com News January 13, 2015 at 06:00 AM EST An escalating price war between the U.K.'s largest supermarkets means that the price of milk is now cheaper than bottled water, research shows. Read More >> Related Stocks: J Sainsbury ADR Tesco Plc ADR Wal-Mart Stores, Inc. Wm Morrison Supermar