【Soft PVC Rubber】: The car coasters are made of environmentally friendly soft PVC rubber, which is durable, high temperature resistant, not easily deformed, feels thick, waterproof, dustproof and odorless. The car cup holder coasters can help protect the car cup holder from scratches, damage, water stains, dirt or dust. Groove pattern design: Our car coasters are designed with an 8D honeycomb groove pattern that catches a small amount of water droplets and prevents them from falling into the car cup holder. It becomes more non-slip than a regular smooth coaster. It has a good grip and prevents the cup from slipping, which helps reduce the noise caused by sliding cups during driving. 【Multiple Uses】: This coaster with a diameter of 12 cm can be used not only in car cup holders, but also at home, in the office, at the dining table and other places. Protect the surface of a table or other surface where you can place a drink, and it can also prevent hot drinks from burning the table surface or the original car cup holder. 【Easy to Clean】: Waterproof car coasters are very easy to clean; you can use a dry or damp towel to wipe them or wash them in water. This is the best gift for family and friends. It can add a warm atmosphere to your car and warm your mind.