The 40 oz. is great for any time you need to carry a lot of liquid without the option of easy refills. Even if your Klean Kanteen sits in your car, your backpack or on your desk for weeks, your water will still stay fresh and clean-tasting. Made from 100% recyclable, food-grade stainless steel that doesn't need a special lining like some other metal bottles. Completely BPA-free and won't leach funky flavors into lemonade. The wide mouth makes it easy to throw in ice cubes and makes it easy to clean, just scrub it out with soap and water, or toss it in the dishwasher. Weight: 11 oz.