Using this Care Bears tumbler is super easy. Just open the lid, pour in your favorite hot or cold drink, and close it up. The double - walled insulation will do its job to keep your drink at the right temperature. When using the straw, make sure it's properly placed in the opening. As for cleaning, you can wash it with warm soapy water. Avoid using abrasive cleaners as they might scratch the tumbler. Also, don't put it in the dishwasher. Store it in a dry place when not in use to keep it in good condition.