Your new coasters are made of a durable, high fired porcelain. These coasters are non absorbent so they will not be easily stained by coffee, tea, or wine spills. The raised rim of the coaster will prevent spills from running onto your table. They are dishwasher safe and can also be washed with a mildly abrasive cleaner and a scrubbing pad.  
 Details include:
 
 Size: 4" dia.
 
 Set of 4
 Porcelain
 
 Natural Cork Back
 
 Made in USA