Using this tumbler is easy. Just open the lid and pour in your favorite drink, whether it's a hot coffee in the morning or a cold beverage on a sunny day. When you're done, close the lid to keep your drink at the right temperature. As for maintenance, you can wash it with mild dish soap and warm water. Remember, if you fill it with hot water, the steam may lift the lid, but that's normal. Don't use abrasive cleaners as they could damage the design on the tumbler.