Using this tumbler is super easy. Just open the lid and fill it with your favorite hot or cold drink. It's perfect for taking to work, the gym, or on a road trip. When you fill it with hot water, remember that the steam might lift the lid, but that's okay. To keep it in good condition, wash it regularly with mild soap and warm water. Avoid using abrasive cleaners that could scratch the surface. After washing, dry it thoroughly before storing it. This will help maintain its ability to keep your drinks at the right temperature for a long time.