The Klean Kanteen 18oz Classic Bottle Sport Cap is the original stainless steel water bottle designed for kids and adults with easy hydration in mind! The single wall design is lightweight, small and easy to take anywhere. The Klean Coat feature is a new standard in durability and safety for not only people but also the planet! This coat finish is four times more durable to reduce impact and is also chip-resistant to keep up with your activities! The electropolished interior is a safe and non-toxic process that allows the rounded corners to be easily cleaned.