Supreme Court Heat Changing Mug - Add Coffee or Tea to Reveal the Winners of Famous Supreme Court Cases - Comes in a Fun Gift Box See the winners and the losers in over 30 famous US Supreme Court cases. Add a hot beverage and the losers disappear, revealing who won these landmark cases. 12 oz. ceramic mug. Comes in a colorful box. Color changing cups are microwave safe, but not dishwasher safe. Hand wash only. Don't soak. Click on "The Unemployed Philosophers Guild" above the product title to see more great gifts. UPG truly has presents of mind.