Using this tumbler is easy. Simply open the Closeable Press-In Lid, fill it with your favorite hot or cold drink, and close the lid. You can drink directly from it or use a reusable straw. It fits well in most cupholders, so you can take it on the go. When it comes to cleaning, it's dishwasher-safe, thanks to the Color Last™ powder coat. Just make sure to use a mild detergent. For long - term use, avoid dropping it on hard surfaces as it's made of stainless steel but can still get dented. Keep it in a cool, dry place when not in use. This tumbler is BPA - Free and Toxin - Free, so you can enjoy your drinks with peace of mind.