Originally Posted by
devianb
I use a small metal thermos. For something plastic I just buy a 20z bottle of something and use it a couple times, cheap enough to replace regularly. If hell bent on using those plastic bottles I would wash it out with lemon juice. It helps, but you will still get that plastic taste if you leave water in the bottle all day.
That plastic 'taste' isn't just a flavor, it's the result of chemicals leeching into the water. As far as I know, even hard plastic like Nalgene leach over time. I second all of the Klean Kanteen remarks mentioned above - they're cheap enough and should last forever. Tastes clean, too.