Using this tumbler is super easy. Just open the lid, pour in your favorite drink, whether it's hot coffee or cold juice, and you're good to go. When it comes to cleaning, you can simply wash it with warm, soapy water. For maintenance, try to dry it thoroughly after each wash to prevent rust. Remember, if you fill it with hot water, the steam may lift the lid, so be careful when opening it. Also, don't use abrasive cleaners as they could scratch the surface.