Elevate your morning ritual and reduce your eco-impact with the Porter Mug. A carefully crafted ceramic mug is fitted with a protective silicone sleeve to create a reusable mug for your daily coffee or tea – say goodbye to disposable cups. • ONE OF A KIND: What makes our Terrazzo products truly unique is that they are one of a kind. Made by fusing small flecks of multi-colored silicone into a single-colored sheet, the pattern on each product is unique. While the edges of the silicone may vary slightly from a straight line, please note that this is a natural characteristic of our manufacturing process and not a defect.