As many people make an effort to help the environment and make healthy choices, they opt for a re-usable water bottle. However, all water bottles are not created equal. In fact one company has recently shared that the liner of the aluminum bottle contains small amounts of bisphenol-A, (BPA), the very reason to avoid plastic bottles! What is going on is simple, there is essentially a plastic bottle inside the aluminum bottle.

Inside the bottle is a liner to keep your liquid separate from the aluminum. Adding hot liquid or simply aging, can cause the BPA to leach out. Sigg has offered to exchange the bottle if you have the old liner. Note, the liner ingredients are a trade secret, just like the first time. It is easy to recognize the new liner, they changed the color from a copper or bronze to a pale yellow.



Even though Sigg has changed their liner, this does not mean other manufacturers have. A safe bet is stainless steel. And according to the article, Kleen Kanteen, ThinkSport, and Nalgene all sell stainless steel water bottles that are BPA-free and, most importantly, don't have any liners (so there aren't any potentially dangerous secret ingredients to worry about).

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