Using this Klean Kanteen bottle is a breeze. First, open the Twist Cap. You can use the built - in reusable steel straw for sipping or drink directly from the rounded lip. It's great for filling with water, sports drinks, or your favorite beverages. When you're on the go, the swivel loop on the cap makes it easy to carry. For cleaning, you can simply rinse it with warm soapy water. The rounded lip and internal thread design make it easy to reach all areas. Remember to dry it thoroughly before closing the cap to prevent mold growth. Also, avoid using abrasive cleaners as they may damage the bottle's finish. Store it in a cool, dry place when not in use.