Used to harden plastics and commonly found as a liner in cans and bottles, BPA has health risks both known and unknown, which have caused many consumers to step back from the use of plastic bottles to store food and beverages. Legislative bans on BPA-containing food containers have been gaining momentum.
Enter the lined aluminum bottle. Shiny, metallic, sleek, and (allegedly) totally plastic-free, the bottles have gained credibility as both environmentally friendly -- no more single-use disposable water bottles -- and health conscious -- no BPA worries. Swiss bottle manufacturer SIGG in particular gained significant market share, with its metal bottles retailing for upwards of $20 each at upscale stores like Whole Foods.