Using this mug is easy. Just pour your hot or cold drink into it, and watch as the design changes right before your eyes. When it comes to cleaning, don't put it in the dishwasher. Always wash it by hand with mild soap and warm water. To keep it in good shape, avoid using abrasive sponges. Also, don't expose it to extreme temperatures outside of normal drink temperatures. With proper care, this mug will keep showing off its cool heat - changing design for a long time.