Trivets are screen printed, kiln formed glass, 6" square, with rubber bumpons on the bottom to protect your surfaces.  Trivets will handle very warm dishes, they also make great accent/art pieces - use a plate holder or picture ledge and attach it to your wall or prop it up in a window when you're not using it.  While it is dishwasher safe (we like the china/light cycle), we recommend hand washing.