Using this tumbler cup is easy. Just open the secure lid, fill it with your favorite drink, put the lid back on, and use the straw to sip. When you're done, simply remove the lid and straw. For cleaning, you can wash it with mild dish soap and warm water. Make sure to dry it thoroughly before using it again. Avoid using abrasive cleaners as they might scratch the matte finish. Don't expose the cup to extremely high temperatures as it could damage the ABS material. With proper care, this cup will serve you well for a long time.