Using these Vietri Old St. Nick mugs is super easy. Just pour your favorite hot or cold drink into them. They're great for coffee in the morning, tea in the afternoon, or hot cocoa during the holidays. Since they're dishwasher safe, you can simply place them in the dishwasher for a hassle - free clean. However, to keep them in top condition, avoid using abrasive sponges as they might scratch the hand - painted design. When using them in the microwave, start with short intervals to prevent overheating. If you're going to store them in the freezer, make sure they're completely dry first. This will help these lovely mugs last for a long time and continue to bring holiday cheer to your daily life.