6 PCs Silicon Coaster Hot Cup Glass Holder and Cover. Insulation performance, non-slip, one side suitable for kitchen table mats, bowls mats, dish mats, pot holders, coasters, table mats, etc. Protect your table and never leave any mark or stain on your desk. Food-grade silicon, the material won’t stain, mold, mildew, or absorb orders, and it’s safe to use in the kitchen.