A minimalist upgrade to your disposable cups. The Porter Mug features an interior ceramic with a protective silicone sleeve that's soft to the touch and scratch-resistant. Crafted from durable ceramic with a matte silicone wrap and a BPA-free press-fit lid. Microwave-safe, dishwasher-safe. This mug doesn't insulate, meaning drinks will cool at a regular pace. Heat the mug with hot water first if you like your drinks piping hot.