"Last week, Swiss company SIGG splashed a bunch of ice water in the faces of consumers who go out of their way to avoid products containing bisphenol-A (BPA). The company announced that the linings formerly used in their aluminum bottles did, in fact, contain the controversial substance." - Consumerist.com

http://consumerist.com/5345747/sigg-will-replace-bpa+containing-bottles-for-free

There is a "voluntary exchange program" for those effected.