Starting today, Starbucks will try to sell consumers on the idea of helping to clean up the world's water supply when it begins rolling out Ethos bottled water in its 5,000 U.S. stores. The company plans to donate $10 million over the next five years for clean-water sources in poor countries...Meanwhile, Procter & Gamble is in the midst of making the world's clean-water crisis its primary philanthropic mission, using its Pur-brand household water-purification system.