To use these mugs, simply pour your favorite hot cocoa or beverage into them. They're great for sipping on a spooky Halloween night. Remember to handle the mugs carefully, especially when they're hot from the microwave. Since they're dishwasher safe, you can easily clean them after use. Just place them in the dishwasher as you would with other dishes. For best results, avoid using abrasive cleaners on the mugs to keep the ghost images looking vibrant.