Using this cup is a piece of cake. Just open the secure lid, fill it with your favorite drink, put the lid back on, and you're good to go. If you want to sip through the straw, simply adjust the lid batten. When it comes to cleaning, you can use mild dish soap and warm water. Avoid using abrasive cleaners as they may scratch the stainless - steel surface. Store the cup in a dry place when not in use to prevent rusting. Also, don't overfill the cup to avoid spills when carrying it around.