One mug for your many moods. The Mood Swing Mug was one of the first things ever made and sold by Friend Assembly. This emotional coffee companion features three expressions that go around the mug as you rotate it - "Frown to Meh to Yay!" It'd make the perfect gift for the moody person in your life. Porcelain. Food and dishwasher safe. Gets HOT in the microwave so take caution not to burn your little mits.