Whether you're heading out for a short hike or giving that big presentation at work, the 18oz Klean Kanteen Classic holds enough to keep you hydrated, but is also small and compact so it fits easily into your bag, pack or briefcase. Just like every Klean Kanteen, the 18oz Classic 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 18oz Classic comes with the new and improved Loop Cap 3.0 in Black that's six times stronger and more impact resistant. The large-mouth design makes it easy to pour in ice cubes or a smoothie packed with frozen berries. Cleaning the 18oz bottle is as easy as giving it a quick scrub or running it through the dishwasher.