Using this tumbler is easy. Just open the lid, fill it with your favorite hot or cold drink, and close the lid. It's great for taking with you on hikes, to work, or just around town. When it comes to cleaning, you can hand - wash it with mild soap and water. Make sure to dry it thoroughly before using it again. Remember, if you fill it with hot water, the steam might lift the lid, but don't worry, that's normal. Keep it away from sharp objects to avoid scratches and it'll last you a long time.