When 27 ounces just isn't enough, this is. The 40oz Kanteen® Classic is great for long car trips, camping, a late-night session at the office, a trip to the beach or any time you need to carry a lot of liquid and don't have the option of easy refills. The 40oz is available with the Sport Cap 3.0; featuring a soft silicone spout, 25% higher flow rate and "chirp" free hydration. Klean Kanteens are made from high quality, 18/8, food-grade stainless steel; totally free of BPA and other toxins. Because stainless steel itself is safe, they don't need to coat the inside of the bottle with a plastic or epoxy lining, one of the main differences from aluminum bottles. Stainless caps are also available and all of their caps are BPA-free.