"The Wine Karafe(TM) was designed to hold a standard, 750ml bottle of wine and is made from high quality, 18/8, food-grade stainless steel that's totally free of BPA and other toxins. Because stainless steel itself is safe, we don't need to coat the inside of the bottle with a plastic or epoxy lining, which is one of the main differences between a stainless steel Klean Kanteen® and aluminum bottles.

Referenced from kleankanteen.com