Using this travel tumbler is easy. Just fill it up with your favorite cold drink, put the lid on, and you're ready to go. Make sure the lid is tightly closed to prevent spills. When it comes to cleaning, you can wash it with warm, soapy water. Avoid using abrasive cleaners as they might scratch the tumbler. If you notice the straw getting dirty, remove it and clean it separately. Also, don't put it in the dishwasher as it could damage the tumbler or the straw. Keep it in a cool, dry place when not in use to maintain its quality.