According to the Asahi (Japanese), the Tokyo Metropolitan Waterworks is stepping up its campaign to promote tap water. Back in the 70's, the city's water had a reputation for being cloudy and smelling of mould which led to the big take-up of bottled water. Since the early nineties, however, the waterworks has installed new purification equipment and now claims that independent tests show that water quality is on a par with bottled varieties. As part of the campaign, the city produced bottled tap water in 500ml bottles which they initially gave away but now have started to sell in selected sites for 100 yen.