Keep Your Car's Cup holder Clean,These car coasters are made of absorbent stoneware that absorb water rings or water drops on the surface of the freezing container,and carelessly spilled liquid,keep your car clean and tidy,while adding color and fun to your ride.Absorbent Material:Made of super absorbent ceramic,durable stoneware construction allows for continuous absorption of condensationFinger Slot Design :Absorbent car coaster design incorporates a convenient finger slot makes it easy to remove for cleaning and air drying.Ceramic Coaster Size Pack of 2 car coasters included,2.56" width x 2.56" length x 0.23" height,Standard size is designed for cup holders,fit for most cars,like boats,trucks,etc.