You're my cup of tea.
The coasters have been treated with three coats of a water and heat resistant lacquer. There are four cork circle pads on the bottom of each coaster to prevent scratches and save your furniture. Each tumbled marble tile measures 4"x4" and has natural characteristics that make every single one unique. To clean, simply wipe with a damp cloth.
Our coasters are not dishwasher safe, but you can wipe them with a cloth soaked in mild soap and warm water. Since the ceramic is absorbent, the quicker you wipe up any spills the better stain prevention for coloured beverages.