Using this tumbler is easy. Just open the lid, pour in your favorite drink, and you're ready to go. It's great for carrying your hot coffee to work or iced tea on a picnic. Remember, when you pour hot water into the tumbler, the steam may cause the lid to lift. This is normal and not a sign of a problem. To keep your tumbler in good condition, wash it with mild soap and warm water after each use. Don't use abrasive cleaners as they can scratch the surface.