Just like every Klean Kanteen, the 40oz bottle 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.
Food-grade stainless steel is used in the brewing, food and winemaking industries too. It's the material of choice because it doesn't retain or impart flavors. No matter how many times you refill it, no matter what you put into it, your Klean Kanteen will keep your drinks fresh, crisp and clean tasting. All our caps are BPA-free too, and we offer stainless steel cap options for Classic bottles as well. The 40oz Classic is also available with the new and improved Sport Cap 2.0 that's six times stronger and more impact resistant.
The large-mouth makes it easy to throw in big stuff like ice cubes and quick to clean too just scrub it out with soap and water or toss it in the dishwasher.
Really good bottles, got one as a gift and wen't ahead and got one for myself.