The 18oz Classic water bottle is a stainless steel bottle designed for kids and adults, with quick hydration in mind. Single-wall, non-insulated design is lightweight, small, and easy to bring anywhere. Made with certified 90% post-consumer recycled 18/8 stainless steel, featuring our chip-resistant, durable Klean Coat finish. The 18oz size features a narrow profile for easier gripping, packing and carrying. 100% leakproof Flip Seal Sport Cap comes with an ergonomic spout that opens and closes with just a flick of the thumb and can be used with or without the included stainless steel straw for maximum versatility. Great for running, biking, hiking, fitness and your active lifestyle.