Color Changing Mug - Sister Story - Large 16 Ounce - Porcelain Quote: A Sister shares childhood memories and grown-up dreams. Story: Two sisters enjoy playing together as young children and then share their dreams as adults walking toward their future. Every mug tells a story. Each mug starts as a solid color with a powerful quote and artwork. As soon as you add a hot liquid, the story unfolds and the artwork transitions. The story mugs are made of high-quality porcelain, have a 16 oz capacity, and feature a unique square shape. BPA Free Manufactured in compliance with California Proposition 65 and US FDA 7117.06-.07