High-quality silicone material: These high-quality silicone coasters are made of smooth, non-slip, environmentally friendly, high-temperature resistant, odorless, waterproof, and heat-insulating silicone that effectively protects your table and other surfaces. They also come with a durable metal stand for storage. You can use them directly on the dining table under drinks or coffee cups. Practical design: Silicone coasters can reduce heat conduction and protect the tabletop. The protruding design on the edge of the coaster is slightly higher than the center, which prevents spilled water from wetting the table and sticking to the bottom of the cup. Silicone coasters with a non-slip base keep the cups in place. You don't have to worry about documents getting wet from spilled drinks or coffee, or leaving scratches on your precious desk. Advantages: Silicone coasters are more non-slip and heat-insulating than metal coasters; they do not absorb liquid like felt coasters and are easy to clean. They are softer than wooden coasters and remain new for a long time. Reusable, soft, and thermally stable waterproof coating. After use, these coasters are rinsed with water and air-dried to restore their new appearance. Wide range of uses: These black coasters are suitable for many occasions: office, living room, bedroom, restaurant, cafe, classroom, etc. High-quality silicone coaster with a diameter of 10 cm and a thickness of 0.3 cm. Suitable for most mugs, such as glass mugs, tea cups, coffee mugs, etc.