The car cup holder coaster is non-slip, waterproof and dustproof, which can protect the original car cup holder slot from water stains, dirt, dust and scratches. The cup holder has a diameter of 2.75 inches and a thickness of 0.24 inches. The thicker model is thicker than other similar products on the market. Wide compatibility, suitable for 99% of the cars on the market, can also be used in homes and offices. Made of high-quality environmentally-friendly thick silicone material, it is not only durable, high temperature resistant, and odorless, but also can avoid rattling. Car coasters are easy to clean. They can be cleaned with dry/wet paper or towels, or they can be washed in water and then dried in wind or sunlight. Personalized design, stylish and versatile, can be used in coasters and anywhere else. Match almost all car interior accessories to enhance the grade and appearance of the car.