2.75 inch in diameter car coasters, fits most cars, trucks and SUVs, boat, or even stroller. Eye-catching full-color printing add more fun to your car. Made from stone ceramic with natural authentic cork base. The absorb ability of this car coasters is better than normal rubber coaster. The coaster absorbs all the moisture from your cup, protect the cup holder, and keep your car clean. These car cup mats can easily wash in the water and brush it to clean. Dry it in the wind or sunshine. You don't need to worry about them fading. These ceramic car coasters are suitable for both daily life and outdoor self-driving tour, great gift for housewarming, birthdays and New Years.