Carina Nebula NGC 3372 the Grand Nebula Pink Purple and Blue with shiny stars Astronomy. Credit: ESO/T. Preibisch
This round rubber coaster is made of a durable heat-resistant polyester fabric top, backed with a neoprene rubber non-slip backing, which keeps things from sliding. It measures 3.5" in diameter and 1/8" thick. It will not discolor or fade, machine washable.