Keep those hardworking serving surfaces in a bar, restaurant or at home safe from scratches, damages and condensation with this rugged beverage coaster. The 4" square mat is made of real slate with chipped edges, so no two of them are exactly alike. Foam dots on the bottom keep mats and drinks from sliding and scratches from the material. Food-safe coating. Natural tone. Add your school, sports team, organizational or company logo or message to customize. Comes individually gift boxed.