Using this tumbler is super easy. Just open the lid and fill it with your favorite drink, whether it's hot coffee or cold juice. When you're done, close the lid tightly to keep your drink at the right temperature. Remember, when filling it with hot water, be aware that the steam may lift the lid. This isn't a problem, just a normal occurrence. To keep your tumbler in great shape, wash it regularly with mild soap and warm water. Don't use abrasive cleaners as they might scratch the surface. Enjoy your drink with this stylish and practical tumbler!