When the mug is cold, the image of Bob Ross reminds you to be calm and find time in your life to create. When you pour in a hot beverage, a Bob Ross painting appears to inspire you. Officially Licensed by Bob Ross Inc. 12 oz. ceramic coffee cup with a comfortable handle. All of our disappearing mugs come in a beautifully designed, colorful box. Heat activated color changing mugs are microwave safe, but not dishwasher safe. Hand wash only. Don't soak. Click the store link near the product title for more great gifts. UPG has presents of mind.