Modern-twist Coaster Notz Silicone Coasters, Tree of Us, Black/White, Set of 4 Set of four coasters made from FDA-approved, food-grade, anti-microbial silicone that you can write on Remove spills and ink on the coasters from pen or dry-erase markers with a quick wipe down or rinse; they're also dishwasher safe and won't crease or rip Safe for people and the planet: free of BPA, PVC, lead, latex, and phthalates Appealing pattern designed by an independent artist and silk-screened on to the coaster by hand Measures 4 inches by 4 inches with heat resistance up to 425 degrees Fahrenheit