Aluminum bottles/cans are lined with plastic, to prevent the liquids acquiring a metallic taste. Beer cans are usually lined with BPA - which is bad news for yo

Aluminum bottles/cans are lined with plastic, to prevent the liquids acquiring a metallic taste. Beer cans are usually lined with BPA - which is bad news for your endocrine system. Sigg bottles have recently moved to a BPA-free lining, but it's still plastic.