These couple coffee mugs are super easy to use. Just fill them up with your favorite hot or cold beverage and enjoy. They're safe to use in the dishwasher and microwave, but to keep the graphics looking great for a long time, we recommend hand - washing. When washing by hand, use a mild dish soap and a soft sponge. Avoid using abrasive cleaners that could scratch the ceramic. Store them in a dry place, away from sharp objects to prevent chipping. And since the artwork is copyrighted, don't try to reproduce it.