Almost 40 billion plastic water bottles clog our country's landfills each year. Stop the insanity! Get more mileage—and beverage variety—with reusable bottles and flasks from eco-conscious companies like Nalgene, which makes chemical-free bottles. Sigg bottles come in mod colors and patterns, while Klean Kanteen makes stainless-steel bottles that hold ice cubes to stay refreshingly cold all day.

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