Review on Absorbent Gray Stone Coasters for Drinks - 6pcs Set with Holder - Wood Grey Coasters for Cups & Tables by David Dreher

Looked like the picture on the site. They absorb condensation well. The cork on the bottom keeps the countertop surface in good condition. The top is not glossy and does not have a smooth surface. This attribute prevents this coaster from sticking to the bottom of the glass when picked up. The combination of these three properties makes countertops fairly easy to get dirty and difficult to clean. I pick up a few spots when the coaster either falls on the floor or coffee table or the glass fogging up all over the furniture.