Using this tumbler is super easy. Just open the lid, pour in your favorite drink, and you're ready to go. It's great for keeping your coffee hot on your way to school or your iced tea cold during a long study session. When filling with hot water, be careful as steam can lift the lid. To clean it, simply use mild dish soap and warm water. Avoid using abrasive cleaners that could scratch the surface. Store it in a dry place when not in use.