Using this tumbler is easy. Just fill it with your favorite drink, put on the lid and insert the straw, and you're ready to enjoy. When personalizing, you can add your custom ideas and slogans to the tumbler. As for maintenance, simply wash it with mild soap and water. Remember, never put this tumbler in the microwave to avoid damage. Since it's BPA - free, you can use it with confidence for your daily drinking needs.