Modern-twist Coaster Notz silicone coasters do more than protect the tabletop from condensation on the bottom of a glass. Their silicone surface allows you to write on them with a dry-erase marker or ballpoint pen, making them useful as place cards, for wine-tasting notes, to doodle while you imbibe, or simply for jotting down messages next to your phone. Wipe off the ink with a damp cloth or with a rinse, and the coasters are like new for use again and again. Like all Modern-twist products, Coaster Notz are made from FDA-approved food-grade silicone, an anti-microbial, nonporous material produced from natural elements that is free of BPA, PVC, lead, latex, phthalates, and other harsh chemicals. These coasters are heat resistant up to 425 degrees Fahrenheit but should not be used as trivets. They're pleasing to the touch and beautiful to the eye, offered in a variety of designer colors and patterns including this Grain motif. After use, a simple wipe down or rinse is the only requirement to prevent staining and to remove ink. They're even dishwasher-safe and won't crease or rip. Coaster Notz further the Modern-twist mission to provide eco-chic home products for a sustainable planet with aesthetically inspiring designs that are made from pioneering materials. Sold as a set of four and packaged in a recycled paper box, each coaster measures four inches by four inches with rounded corners.