Sweaty glasses leaving rings on your furniture or desktop? Are you using notepads, magazines or homework to protect your furniture? STOP! Try out these over-sized absorbent stone coasters. They have a porous stone surface that absorbs moisture from your beverage glass, and the cork backing prevents nicks and scratches to your furniture. With a color-coordinating wire mesh tray included, these make great gifts for students and alumni (or treat yourself!).