Review on Premium CoasterStone EC500 Absorbent Coasters - 4 Inch Size by Patrick Burton

This is the second batch of these coasters that I have purchased. They absorb liquids really well, but as one reviewer noted, they leave stains. So if you spill coffee on it, most likely you will not wash it. You can minimize the stain by bleaching it, but it won't go away. I've had bad experiences with CoasterStone patterned dish coasters because they don't seem as absorbent. However, I think it can minimize staining since they are less porous.