I have often used the Nalgene brand water bottles (made of Lexan plastic) thinking I was doing something good for the environment by reusing a water bottle. However, I recently read an article about how even those water bottles can leak toxins. The article mentioned stainless steel bottles are better and the water will taste purer (is that a word?). So after much research and investigation I found that the Sigg brand water bottle is considered the best on the market. Not only is it the most durable but it far exceeds FDA standards and emits no toxins into your water. And they come in great colors/designs!!! =0) So today I bought 2. One for me and one for my little girl.