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Keep disposable plastic bottles out of landfills and purchase a reusable stainless steel hydration bottle. Not only are the new Kor Vidas ($25) made with durable stainless steel, they are designed with a tapered profile to make them easier to carry. The Vidas also feature a twist-off cap with an ergonomic handle and a smooth, threadless spout similar to the One and the Delta. [thanks Eric]