Cohas Chalkboard Black Coasters with Fine Tip White Waterproof Chalk Marker Two Ceramic Coasters Set of two chalkboard coasters Ziggyboard Chalkboard Glazed permanent surface, base has 4 firm round rubber bumpers, no mar, no slip and no staining Tile is handcrafted porcelain from Mexico finished in New Hampshire, not chalkboard paint but matte black chalkboard kiln fired surface Comes with FREE Fine Tip White Chalk Marker, Waterproof removes with Windex will not run with any beverage including beer, wine and spirits 1mm Marker makes a fine 1/32 in line can be used to fill in larger areas, see Ziggyboard Brand markers for other options including metalics. Refill kits of Ziggyboard chalkboard tile available without markers for your party or event Follow priming instructions for marker, if used for party or wedding favors prime ahead of time. Cups with rough bottoms may abrade chalkboard paint. Tile can be made permanent with Acrylic matte clear spray or cleaned with Windex and used over and over again