Using this tumbler is a breeze. Simply open the lid, pour in your drink, whether it's a cold juice or a hot cocoa, and close the lid tightly. When you're out and about, just hold it by the body and enjoy your drink. As for the steam lifting the lid when filled with hot water, don't worry, it's normal. To keep your tumbler in great shape, wash it with mild soap and warm water after each use. Avoid using abrasive cleaners as they can scratch the surface. Also, don't put it in the dishwasher. That way, your tumbler will last you a long time and keep your drinks at the right temperature every time.