Using this tumbler is easy. Just open the Closeable Press - In Lid, fill it with your favorite hot or cold drink, and slide the lid shut. You can use it with a reusable straw for added convenience. When it comes to cleaning, you can simply put it in the dishwasher thanks to the Color Last™ powder coat. However, avoid using abrasive cleaners as they might damage the finish. Store it in a dry place when not in use. With its 18/8 pro - grade stainless steel construction, it's built to last, but try not to drop it from a great height to maintain its durability. Also, since it's BPA - Free and Toxin - Free, you can use it with peace of mind for all your hydration needs.