Using this tumbler is easy. Just open the lid, pour in your favorite drink, whether it's hot tea or cold juice, and you're ready to go. When filling it with hot water, be careful as steam might lift the lid. This isn't a problem, just a natural occurrence. To keep your tumbler in good condition, wash it regularly with mild soap and warm water. Avoid using abrasive cleaners as they might scratch the surface. Store it in a dry place when not in use.